flowmaster 80 seies muffler
Joined: Dec 2004
Posts: 2,042
Likes: 18
From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: flowmaster 80 seies muffler
I get all of my flowmaster mufflers through Performance Curve.
http://performance-curve.com/
They used to also sell them cheap through their ebay store. Best price I could ever find, including the local places.
http://performance-curve.com/
They used to also sell them cheap through their ebay store. Best price I could ever find, including the local places.
Senior Member

Joined: Aug 2008
Posts: 710
Likes: 32
From: pensacola florida
Car: 1989 Firebird Formula
Engine: 5.7 LS1
Transmission: 4L60E
Axle/Gears: 3.27
Re: flowmaster 80 seies muffler
It all really depends on what sound and performance you want, i have mostly stock ( SORT OF ) L98 with no cats and i enjoy the flowmaster sound, i didnt go 3 inch though because im not making 300 HP. If anything with everything i do have done im running pretty close to GM's estimated 240 HP spec. So im running mostly a full 2 1/2 inch 80 series setup. Mainly if you know some commercial people real well at parts store, they will cut you a deal, but mostly a parts store or online is the way to go for cheap.
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