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FLOWMASTER 40 SERIES DELTA FLOW MUFFLERS

Flowmaster’s Delta Flow 40 Series two chamber design incorporates Flowmaster’s patented Delta Flow technology. The “Delta” deflectors generate increased scavenging for better performance and reduced interior sound. Perfect for vehicles where an aggressive exterior tone is desired with reduced interior tone.

  • The quietest muffler option in our 40 Series two-chambered line
  • Reduced resonance over 40 series mufflers
  • Stainless steel 409S version backened by lifetime warranty
  • Features advanced two-chamber design & Delta Flow technology
  • Available in aluminized steel or 409S Stainless for harsh weather
  • Both styles are fully MIG-welded for maximum durability

 

 

 

40 Series Delta Muffler Table

IN/OUT C/C O/C C/O O/O O/O SAME SIDE
2.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.00' AND inlet_position = 'Center' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
942040
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
942041
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.00' AND inlet_position = 'Center' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
942042
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
942043
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
942440
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
942441
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
942442
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
942443
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
942444
2.50"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
942540
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
942541
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
942542
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
942543
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
942544
3.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '3.00' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
943040
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
943041
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '3.00' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
943042
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
943043
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
409S Stainless Steel Models
2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description LIKE '%40 Delta Muffler 409S%'
842440
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description LIKE '%40 Delta Muffler 409S%'
842441
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description LIKE '%40 Delta Muffler 409S%'
842443
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description LIKE '%40 Delta Muffler 409S%'
2.50"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description LIKE '%40 Delta Muffler 409S%'
842541
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description LIKE '%40 Delta Muffler 409S%'
842543
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description LIKE '%40 Delta Muffler 409S%'
3.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '3.00' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
843041
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '3.00' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Offset' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Same Side' AND outlet_diameter = '3.00' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
IN/OUT D/C C/D D/D O/D
2.00"/2.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Center' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
9420402
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
2.25"/2.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
9424412
2.25"/2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
9424422
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.25' AND description NOT LIKE '%40 Delta Muffler 409S%'
2.50"/2.00"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
9425402
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.00' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
9425412
2.50"/2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
9425422
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
9425432
2.50"/2.50"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
9425400
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '2.50' AND description NOT LIKE '%40 Delta Muffler 409S%'
3.00"/2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
9430422
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
3.00"/2.50"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
9430402
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description NOT LIKE '%40 Delta Muffler 409S%'
9430412
409S Stainless Steel Models
3.00"/2.25"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.25' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
3.00"/2.50"
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Center' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Center' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
8430402
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Dual' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'
SELECT Part_Number FROM fmmnew.part_sizes WHERE category2 LIKE '%40 Series Delta Flow%' AND outlet_position = 'Dual' AND outlet_diameter = '2.50' AND inlet_position = 'Offset' AND inlet_diameter = '3.00' AND description LIKE '%40 Delta Muffler 409S%'