high flow cat.

[03accent]

anybody know some web sites for cat.s

ed

[Medic_01]

any exhaust shop should have an off the shelf cat convertor, or high flow cat.

however if you want a specific "hyundai" cat, try KDMstuff.com, however they are the same as any other item.

[MechaniX_034]

I've had some good experiences with Metalcat's, and any exhaust shop should be able to get them. I'd suggest oversizing though, using a 4" cat and 2 x 4" - 2 3/4" reducers to the flanges.

[Jed118]

Yah definitely, We put a 2.5 inch on liz's 2.5 inch exhaust and it is a high flow unit, it sucks balls. Totally restricts the exhaust, makes a droning sound, I can FEEL the backpressure generated by it. I'm trying to convince her to remove it, put in a blown O2, and save the good cat and o2 just for the yearly tests.

It's such a restriction...

[MechaniX_034]

Originally Posted by Jed118

Yah definitely, We put a 2.5 inch on liz's 2.5 inch exhaust and it is a high flow unit, it sucks balls. Totally restricts the exhaust, makes a droning sound, I can FEEL the backpressure generated by it. I'm trying to convince her to remove it, put in a blown O2, and save the good cat and o2 just for the yearly tests.

It's such a restriction...

We tried to put a cat on a 500kW, RB26DETT powered Skylline once(it was the GTS-T with no fancy electronics or 4WD) The 4" unit robbed it of more than 30kW ATW. We couldn't find one large enough to do the job.

But a cat that size should suit low-mid end output fine; its when you cross the 280-300kW mark that things get nitpicky IIRC.