4 inch cat?
Senior Member
Joined: May 2005
Posts: 777
Likes: 1
From: Windsor Ontario Canada
Car: 89 jaguar xjs convertable
Engine: 89 L98 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.23 dana 44
Re: 4 inch cat?
Not that I am aware of.....your only option would be a hiflo 3" with the inlets and outlets opened up, or you could look for some factory 3" cats that have a larger (taller) body...then cut off the inlets and outlets and weld on some 4" nipples. Some of the truck cats (pick-ups) have a large enough body that you could do that but you may run into clearance issues getting them on you car.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 4 inch cat?
I thought Magnaflow recently came out with some, but I couldnt find it on their website. Maybe you'll have better luck.
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