Cat by-pass (X-pipe vs straight)
Thread Starter
Instructor
Joined: Jun 2005
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Cat by-pass (X-pipe vs straight)
Is there a difference in the sound (or performance) of the two cat bypass designs? X-pipe compared to the two separate straight pipes?
There are all kinds of theories about the harmonics of x-pipes, but I am wondering if anyone has actually compared the two and what the difference is to the ear?
There are all kinds of theories about the harmonics of x-pipes, but I am wondering if anyone has actually compared the two and what the difference is to the ear?
Rennlist Member
Joined: May 2001
Posts: 9,663
Likes: 557
From: Solana Beach, CA
Well...
I have had both the separate crossover pipes from Fabspeed and now the X pipes with 200 cell sport cats. The crossover pipes work...but they are cat converter delete. I need cats in Cali...BTW I did recently pass Cali smog with my X pipes, 200 cell sport cats and FD I muffs
The bad news on the individual cross over pipes, the one on the low side seems to get scraped...my car is at RS ride height.
Re. the X pipe set up from Fabspeed, in conjunction with FD Motorsports Stage 1 mufflers, my 80,000 mile 97 993 with an unmolested engine, cranked out 254 HP to the rear wheels. I didn't dyne the car with the cross over pipes.
A pal with a 993 that I go to the track with, observed that before my conversion to X pipes and FD I, we were neck and neck on the straights. Post conversion, I pull away from him significantly.
The bad news on the individual cross over pipes, the one on the low side seems to get scraped...my car is at RS ride height.
Re. the X pipe set up from Fabspeed, in conjunction with FD Motorsports Stage 1 mufflers, my 80,000 mile 97 993 with an unmolested engine, cranked out 254 HP to the rear wheels. I didn't dyne the car with the cross over pipes.
A pal with a 993 that I go to the track with, observed that before my conversion to X pipes and FD I, we were neck and neck on the straights. Post conversion, I pull away from him significantly.
