High Flow Cat
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From: Hudson OH
High Flow Cat
I have an '88 with few mods. I'm putting on a chambered cat back system and a front Y pipe without the pre cats.
I'm wondering if it would be a good idea to put a high flow main cat in.
Will I see any appreciable performance increase from a new high flow?
Improve the exhaust tone? Or make it way too loud? I'd like a nice mellow roar at WOT.
If I replace the cat I would think one without the air tube would be the best approach (air delete).
I have read that Random Tech has the best. What's best about it?
John
Hudson, OH
'88 Anniversary
I'm wondering if it would be a good idea to put a high flow main cat in.
Will I see any appreciable performance increase from a new high flow?
Improve the exhaust tone? Or make it way too loud? I'd like a nice mellow roar at WOT.
If I replace the cat I would think one without the air tube would be the best approach (air delete).
I have read that Random Tech has the best. What's best about it?
John
Hudson, OH
'88 Anniversary
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Random is the best, as far as I know. They make theirs with good product and good R&D.
Check out Car Sound, too. It's part of Magnaflow. Stay clear of Walker!!!
I would skip the precats. They really don't do much... They help in that first 5 minutes before the main cat reaches temp... and they kill performance!
Check out Car Sound, too. It's part of Magnaflow. Stay clear of Walker!!!
I would skip the precats. They really don't do much... They help in that first 5 minutes before the main cat reaches temp... and they kill performance!
Team Owner
Joined: Sep 2001
Posts: 62,067
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Random Tech is good.
Its just a higher flowing cat than the stocker, much better than stock. Whether or not youll feel the difference is another matter, you should, but I dont think theres a guarantee. It'll make it just a bit louder than with the stock cat.
Its just a higher flowing cat than the stocker, much better than stock. Whether or not youll feel the difference is another matter, you should, but I dont think theres a guarantee. It'll make it just a bit louder than with the stock cat.
Racer
Joined: Mar 2001
Posts: 312
Likes: 0
From: Mesa Az
I have an 88 with gutted precats and a Random Tech hi-flo cat. Passed Arizona emissions and sounds great with the factory exhaust. I had a Ultraflow system but reverted back to stock because they were too loud for me.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Install a Random Tech 3-stage cat; if the E-Check comes to hudson you will pass easily. I have a very similar setup on my '88 and it easily passes in Summit Co.
Instead of trying to get a cat w/o the AIR tubes, just cap off the AIR tubes. You never know what the future brings; remember OH was "almost" a red state....
I don't think the hi-flow cat will effect sound so much as installing an efficient front Y and rear Y. I don't know what each piece contributed but doing the front Y, cat and cat-back was worth close to 20chp.
Instead of trying to get a cat w/o the AIR tubes, just cap off the AIR tubes. You never know what the future brings; remember OH was "almost" a red state....
I don't think the hi-flow cat will effect sound so much as installing an efficient front Y and rear Y. I don't know what each piece contributed but doing the front Y, cat and cat-back was worth close to 20chp.
