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Which Downpipe & Hi-Flow Cat?

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Old May 19, 2004, 06:17 AM
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Which Downpipe & Hi-Flow Cat?

For the Greddy Full Titanium Catback exhaust system?

What's the best downpipe that won't remove the O2 sensor & a hi-flow cat that will all work/bolt up together with the Greddy Titanium catback?

Oh, they can't throw a CEL either
Old May 19, 2004, 06:21 AM
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Originally Posted by [Cyanide]
For the Greddy Full Titanium Catback exhaust system?

What's the best downpipe that won't remove the O2 sensor & a hi-flow cat that will all work/bolt up together with the Greddy Titanium catback?

Oh, they can't throw a CEL either
UR High Flow Cat and HKS DP are the best. The HKS will fit perfectly like stock. Also I have seen the UR DP and it fit very well.
Old May 19, 2004, 07:54 AM
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Oh, I forgot to mention, I want 3" piping all around preferably...
Old May 19, 2004, 12:53 PM
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I have a Helix 3" Dp, great quality and uses the stock donut gasket for a good fit.

It did rub, but since I added the RT 3" highflow cat, which is very nice, no more rubbing issues. This combo with stock intermediate pipe and bushur AB sounds pretty good (not too loud) and made a noticeable performance improvement.

FB
Old May 19, 2004, 01:41 PM
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I have 3" Perrin Downpipe, 3" Ultimate Racing High Flow Cat, Greddy Titanium 3" Catback. Wicked nice and the sound is great. Running a little lean but the problem will be solved soon. Another small but fixable problem is where the Greddy tip sticks out. It is short and is causing the bumper to melt. Heatshield should take care of the problem. Otherwise, a fantastic setup that sounds and really looks great.

Oh, and no CEL with this setup as of this writing.
Old May 19, 2004, 01:52 PM
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Originally Posted by [Cyanide]
Oh, I forgot to mention, I want 3" piping all around preferably...

I have Ultimate Racing 3" down-pipe, no fitment problem.... and I just received their 3" hi-flow cat....very nice made.
Old May 19, 2004, 02:04 PM
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Originally Posted by Sloop
I have 3" Perrin Downpipe, 3" Ultimate Racing High Flow Cat, Greddy Titanium 3" Catback. Wicked nice and the sound is great. Running a little lean but the problem will be solved soon. Another small but fixable problem is where the Greddy tip sticks out. It is short and is causing the bumper to melt. Heatshield should take care of the problem. Otherwise, a fantastic setup that sounds and really looks great.

Oh, and no CEL with this setup as of this writing.
Originally Posted by WhosEVO
I have Ultimate Racing 3" down-pipe, no fitment problem.... and I just received their 3" hi-flow cat....very nice made.
The Perrin and/or the Ultimate Racing downpipes don't eliminate any cats right?
Old May 19, 2004, 02:14 PM
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the UR dn-pipe is not
Old May 19, 2004, 03:57 PM
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Originally Posted by WhosEVO
the UR dn-pipe is not
Is not what? I'm confused, sorry.
Old May 19, 2004, 04:11 PM
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the only exhaust I know that elimantes the cat is the RsR.
Old May 19, 2004, 08:56 PM
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Are we talking about a pre-cat? If it is a pre-cat in the stock downpipe, than the Perrin eliminates that cat.

The Perrin downpipe is a beautiful piece that goes straight to the UR 3" High Flow Cat I have installed. After that the Greddy Titanium takes over. No CEL, and perfect fit. I am getting some turbulence in the downpipe right now because the car is not tuned properly or it is the transmission. Unknow right now. Full 3" Turboback exhaust.
Old May 19, 2004, 09:27 PM
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can u pass inspection in new york with a high flow cat? anyone know?
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