1.  What makes Flowmaster mufflers different?
2.  How does Flowmaster compare to straight thru mufflers?
3.  How do Flowmaster mufflers rate on a flowbench (CFM)?
4.  What does a Flowmaster sound like?
5.  What is the difference between a 40 series and a 50 series muffler?
6.  How do I select the correct Flowmaster muffler?
7.  Will I lose power going from a 40 series to a 50 series, or to a 70 series?
8.  What is "Delta Flow" technology?
9.  What is Hushpower?
10. What kind of performance gains can I expect when installing a Flowmaster
      system on my vehicle?
11. I don’t see what I need in your catalog. Can you custom build what I need?
12. What size exhaust tubing should I use for my street application?
13. Do I need to install an "H" pipe in my dual exhaust system?
14. Is an "X" pipe better than and "H" pipe?
15. Will my late model vehicle run better if I replace the single inlet muffler with a 
      true dual exhaust system?
16. Do I need to run tailpipes after the mufflers?
17. What is Flowmaster's warranty?
18. How can I be sure that I'm buying a Flowmaster muffler?
19. What materials are used to build Flowmaster mufflers?
20. Is Stainless Steel, a better material for manufacturing exhaust products 
       than Aluminized Steel?
21. Will installing a Flowmaster cat-back exhaust system void my vehicle’s 
       factory warranty?
22. Are Flowmaster Performance cat-back exhaust systems and mufflers
     street legal?

See all questions and answers in one page here.

Please note: Using FLOWMASTER performance exhaust in conjunction with other performance modifications i.e. high flow air filters, air boxes, headers etc., can cause an increase in exhaust dB’s that could exceed allowable local limits. For additional information regarding exhaust laws please go to www.sema.org.

If you have further questions, please call our toll-free tech line at
1 (800) 544-4761, or email us here.