JP + Exhaust refinement
Went through a somewhat similar exhaust upgrade/downsize on my car!
Albeit no OEM parts were used, JP took my car from a Racecar loud 3" exhaust system with an H-pipe that went into 3" straight through "RacePro" mufflers and 3" tails... it sounded great at idle or loping into a parking lot but RaceCar loud was just too much!
Kept the Heddman headers on my 440-Pontiac but used their SS reducers to drop to 2.5" SS to an x-pipe that we placed "sideways" ahead of the BMR torque arm and then 2.5" to full stainless Dynomax Turbo mufflers and 2.5" tails out the back.
The new system is mellow at cruise, still has a muscle car sound at idle and sounds angry at WOT!
Can't wait to hear yours Carl!
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Ty Ingle, USAF Retired 
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