I just ordered my y-pipe and high flow cat from Warpspeed with the group deal for $245 shipped, good deal by the way. I was wondering what kind of gains you'all have experienced with either or these mods or both together. I've heard like 12 WHP with the y-pipe, but what kind of gains have you guys REALLY seen and is it very noticeable?

I want a y-pipe hmmmmm

Aaron said the Y-pipe is good for 3/10ths on the 1/4.

i have both and there is noticeable gains. not sure on the exact amount though. but very noticeable.

I put on my y-pipe before anything else and I noticed a definite gain. I am supposed to be getting a high flow cat (*cough* xveganxcowboyx *cough*) and that should help, too.

The y-pipe is arguably the best bolt-on mod. I had it on both of my 92SEs and the difference is readily apparent from 2500RPMs and up. As for the high flow cat, I don't think it really does too much. I replaced my high flow cat with an OEM one, and my low end improved a tad and I can't even feel the difference in the top end. IMHO, a high flow cat is nice for boosted / nitrous maximas, but for our cars $100 is a little steep unless you need to replace the cat anyway.

Yeah, I only got the cat too because it was like $85 shipped and the y-pipe $160. I may eventually do nitrous down the road so I'm glad the cat will come in handy, probably with my next tax return. Thanks for the feedback, anyone have any dyno numbers? I don't care about the slips, I'll take your word for it, but anyone have any wheel HP numbers from the dyno?

Increased gas mileage is a definite. If all you have is a Y-pipe and cat, don’t expect drastic HP increase, especially since the "high flow" cat rarely produces numbers.

mid to high end rpm and the noise level is pretty quiet, to me it's probably little more quieter than stock.

low end is really friggin' loud, it sounds like freaking tin can when I drive with my windows down, and the performance is just like stock on low.

btw, I had the same setup as yours which means that I have a mendrel bent down pipe from WSP w/Magnaflow cat converter, both shipped from WSP.

Overall, I really like it a lot....the installation was such a pain in the nut sack cuz all 4 of my nuts and bolts that held down the cat to catback and down pipe were terribly rusted. Approx 20% of its original masses were left in tack. If your nuts and bolts look way too sappy. Just take it to the shop, don't mess with it. I'd tried, after 6 hours, I was only able to drilled one side....it's really a painful jobs esp with all those abbestos craps flying all over you. And esp if you don't have a welder.

had to replace exhaust studs as i noticed some were broken when i had this mod done about 2 years ago now.

i did CAI at the same time. i have warpspeed y, b-pipe, cat, magnaflow. very loud. and the gains are considerable.

I hope the gains are worth while. I hear they are and this is actually the first performance mod I'm doing other than 17" wheels, which I'm getting rid of in favor of lightweight 16's.

rosamax,

believe me, the gains are worth it. i have a vg, so they are especially worth it for me. you have the ve, so i cannot speak to that issue fairly. but it must be similar: you will be easing the flow of the exhaust gases out the rear of the car. get CAI and a hi-flow muffler at the same time if you can make that. this way, the system is book-ended; more complete and efficient.

start to seriously ponder the fidanza flywheel and blehmco groundwires. with the extra power, you will also consider upgrading the front brake calipers to Z32, or, at the very least, more aggressive pads.