Flowmaster catback sounds mean and loud when hot, tinny and hollow when cold.. why?
Thread Starter
Senior Member
Joined: Jul 1999
Posts: 677
Likes: 0
From: Danvers, MA, USA
Flowmaster catback sounds mean and loud when hot, tinny and hollow when cold.. why?
The subject says it all. It sounds rather weak when cold, but after a long drive, it sounds brutal as hell. Loud, deep, no trace of hollowness. It's a 3", 2 chamber, single in/out catback. I'm also running a high flow cat - before I had the cat, it sounded hollow all of the time.
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91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter
supposed 'peanut cammed' car (yeah, right)
MoreMoodThatMod
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91 Trans Am WS6
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter
supposed 'peanut cammed' car (yeah, right)
MoreMoodThatMod
Senior Member
Joined: Jun 2000
Posts: 712
Likes: 0
From: Los Angeles, Ca, USA
Car: 90 Camaro RS
Engine: 305 TBI
Transmission: T56
because it needs to warm up. kinda like your engine doesnt perform well when its cold, your exhaust doesnt perform well when its cold. 
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Rick
90 Camaro RS 305 TBI
350 on the way!!
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Rick
90 Camaro RS 305 TBI
350 on the way!!
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