Flow Bench Comparison
What's your exhaust leaving on the table?
Tell us your Mustang and what you're running now. See exactly how it stacks up against the FP Street and Race Series.
1 Pick your Mustang
2 Select your current muffler
Bench results — CFM @ 28" H₂O
Your muffler0CFM
FP Street Series0CFM
FP Race Series0CFM
Straight pipe · 485
+0 CFM
More flow with FP Street Series.
Choose your sound
Same chambered tech. Two personalities.
Street Series
650 CFM · daily-driver tuned
Aggressive note, zero highway drone. Helmholtz-chambered to kill cabin resonance so it's loud where you want it and livable where you don't.
Race Series
562 CFM · all-out aggression
Meaner, louder, unapologetic. Built for the enthusiast who wants every start-up to turn heads at the meet.
Get your kit before the first run sells out
First production run ships April 2026. Drop your email to lock your spot on the cat-back waitlist.
You're on the list. We'll be in touch before the first run ships.