Thread: flowmaster upgrate = power loss ?

Its just the mufflers. I know it sounds weird but when you rev it and let go and immediately rev it again it sounds and feels like the 2nd rev is much weaker and the engine struggles with it. Same thing on the freeway when you floor it it dosent throw you back into the seat as much as it did before the install

well then put the stockers back on and see if that fixes it...they sound the best anyway