3" High Flow Cats
Thread Starter
Racer
Joined: Jul 2007
Posts: 318
Likes: 6
From: Alpharetta GA
3" High Flow Cats
I currently have test pipes on a 3" X pipe. I want to add high flow cats, but dont want to pay for LG or other brands that will cost close to $400 for some high flow cats. I found some from flowmaster and other brands, but my main concern is the length of the cat? How long do they have to be to mate with the aftermarket X pipe without needing to cut/weld anything?
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 540
From: Kelowna BC
I currently have test pipes on a 3" X pipe. I want to add high flow cats, but dont want to pay for LG or other brands that will cost close to $400 for some high flow cats. I found some from flowmaster and other brands, but my main concern is the length of the cat? How long do they have to be to mate with the aftermarket X pipe without needing to cut/weld anything?
As for cats, I have Magnaflow metallic which were around $90 each IIRC
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
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if you have lg's just remove the test pipes and measure them... otherwise get the car in the air and measure how much room you have to work with and find some cats that will fit in that space
Thread Starter
Racer
Joined: Jul 2007
Posts: 318
Likes: 6
From: Alpharetta GA
Its a Texas Speed 3" X pipe with texas speed headers. Was just checking to see if anyone knew what size cat might work.
Racer
Joined: Dec 2007
Posts: 286
Likes: 8
From: Osage Beach Mo.
Cats LG
I currently have test pipes on a 3" X pipe. I want to add high flow cats, but dont want to pay for LG or other brands that will cost close to $400 for some high flow cats. I found some from flowmaster and other brands, but my main concern is the length of the cat? How long do they have to be to mate with the aftermarket X pipe without needing to cut/weld anything?
Thread Starter
Racer
Joined: Jul 2007
Posts: 318
Likes: 6
From: Alpharetta GA
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