Agree 100% with Langod
The Flowmasters might give you 5 RWHP +/-
The way how they sound is like +40 HP, but that's wishful thinking.
I dynoed my Challenger with the stock 4 muffler exhaust and I dynoed it with only 2 strait thru 2 1/2 " Flow masters. A full gain of a whopping 8 HP!!! Plus I lost about 10 HP up to 2500 RPM. Thats on a 383 cui 4bbl hot cam setup.
It's all in the mind dude...
The Flowmasters might give you 5 RWHP +/-
The way how they sound is like +40 HP, but that's wishful thinking.
I dynoed my Challenger with the stock 4 muffler exhaust and I dynoed it with only 2 strait thru 2 1/2 " Flow masters. A full gain of a whopping 8 HP!!! Plus I lost about 10 HP up to 2500 RPM. Thats on a 383 cui 4bbl hot cam setup.
It's all in the mind dude...
