Go here http://www.flowmastermufflers.com/fmtest/DOCS/SET.html It's a new 50 series American Thunder catback system for our cars. Does anyone know if it's louder than the existing 80 series American Thunder. I like this new one because it already comes with chrome tips.

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'88 IROC TPI 355, '69 truck 4-bolt, fully balanced, 9.75:1 compression, fully ported '70 truck heads(for now), Harland Sharp 1.6 Roller Rockers, Comp Cams CS 252AH-12, ported '86 TPI converted to speed density, Crane AFPR, Flowmaster 3in. exhaust, Edelbrock TES headers, all emissions equipment is still intact, plan on burning my own chips, many more mods and parts on the way as time and money permits =(
Best E.T. with TBI 305: 16.11 @ 82mph
Haven't been to track with new motor
If you have any questions on converting from TBI to TPI email me at jdkchevy70@yahoo.com
In memory of Dale Earnhardt, I'll miss cheering for that black #3 on raceday!!!

 

well I don't think It should be louder. 50 series is a 3 chamber muffler. I think 80 series is 2 chamber cross flow. but it is dual three inch out. should sound deeper but maybe not quite as loud. some people don't like the sound of 2 chambers. say they are "tinny" sounding. 3 chambers sound deeper

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"I don't trust anything that bleads for five day's and doesn't die"
88 iroc slp headers,borla catback,procharger to come soon.