converting from dual cat to single with a Magnaflow ypipe
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Joined: Sep 1999
Posts: 3,871
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From: Mass
Engine: 350 TPI
Transmission: A4
Axle/Gears: 3.23
converting from dual cat to single with a Magnaflow ypipe
Have any of you OEM dual cat guys replaced the factory ypipe for a single cat Magnaflow setup? Was it a direct bolt in when going with a Magnaflow catback setup as well?
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Joined: May 2015
Posts: 1,154
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From: Temecula, CA
Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: converting from dual cat to single with a Magnaflow ypipe
If you are lucky enough to have the dual cat option, I'd keep it. Less restrictions the better!
Joined: Jan 2013
Posts: 3,038
Likes: 52
From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: converting from dual cat to single with a Magnaflow ypipe
If you do replace the dual cats, I'll buy your old ones!
Thread Starter
Supreme Member
iTrader: (9)
Joined: Sep 1999
Posts: 3,871
Likes: 24
From: Mass
Engine: 350 TPI
Transmission: A4
Axle/Gears: 3.23
Re: converting from dual cat to single with a Magnaflow ypipe
Well the car has 50K miles on it. Im sure the cats are fine but if I replace the system it will only be for a stainless setup and a slightly better sound. The OEM exhaust on the car shows no signs of any rust at all.
Joined: Jan 2013
Posts: 3,038
Likes: 52
From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: converting from dual cat to single with a Magnaflow ypipe
Cool, let me know - I'd come up & pick it up.....I'll bring cash with me too. 
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