MWTB: cat bypass pipe
Thread Starter
Instructor
Joined: Dec 2010
Posts: 134
Likes: 0
MWTB: cat bypass pipe
So I saw a thread about a cat bypass pipe in the 964 Forum, but I was wondering what the pricing would be for a 993 one new/used, and if anyone here has one to sell.
What is required to remove the cat? I've never done any exhaust work, but we have a floor lift (the one that looks like an X) so I could lift the car pretty high in the air
I did my emissions test back in February, how often do I need to smog the car in CA?
Also, how much louder would it make the car, I want it to be loud during acceleration, but relatively quiet going through the neighborhood.
Sorry for all the questions, but just trying to be informed before my decision
What is required to remove the cat? I've never done any exhaust work, but we have a floor lift (the one that looks like an X) so I could lift the car pretty high in the air
I did my emissions test back in February, how often do I need to smog the car in CA?
Also, how much louder would it make the car, I want it to be loud during acceleration, but relatively quiet going through the neighborhood.
Sorry for all the questions, but just trying to be informed before my decision
Nordschleife Master
Joined: Feb 2007
Posts: 5,654
Likes: 93
From: Torrance, CA USA
Smog in CA is every 2 years. Technically speaking a "Test Pipe" may be installed only for off road use.
I have heard that the CHP also operates random checks, although personally I have NEVER seen one.
I had a "test pipe" on my former 911, and I didn't really notice much increase in volume from before to after, that was a 3.0 motor. Would it make a difference on a 3.6, I don't know.
your next scheduled check would be Feb 2012, unless you sell the car before then. Upon exchange of ownership a smog certificate is also required.
I have heard that the CHP also operates random checks, although personally I have NEVER seen one.
I had a "test pipe" on my former 911, and I didn't really notice much increase in volume from before to after, that was a 3.0 motor. Would it make a difference on a 3.6, I don't know.
your next scheduled check would be Feb 2012, unless you sell the car before then. Upon exchange of ownership a smog certificate is also required.
Addict
Rennlist Member
Rennlist Member
Joined: May 2001
Posts: 12,823
Likes: 785
So I saw a thread about a cat bypass pipe in the 964 Forum, but I was wondering what the pricing would be for a 993 one new/used, and if anyone here has one to sell.
What is required to remove the cat? I've never done any exhaust work, but we have a floor lift (the one that looks like an X) so I could lift the car pretty high in the air
I did my emissions test back in February, how often do I need to smog the car in CA?
Also, how much louder would it make the car, I want it to be loud during acceleration, but relatively quiet going through the neighborhood.
Sorry for all the questions, but just trying to be informed before my decision
What is required to remove the cat? I've never done any exhaust work, but we have a floor lift (the one that looks like an X) so I could lift the car pretty high in the air
I did my emissions test back in February, how often do I need to smog the car in CA?
Also, how much louder would it make the car, I want it to be loud during acceleration, but relatively quiet going through the neighborhood.
Sorry for all the questions, but just trying to be informed before my decision
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
Addict
Rennlist Member
Rennlist Member
Joined: May 2001
Posts: 12,823
Likes: 785
i have seen no evidence of this on either of my cars.
On older cars w/o adaptive engine management that has been the case, for instance the MFI a and carbed cars are notorious for being finicky about exhaust. This is not the case w/ Motronic 2.0 or newer used in 964 up cars
Nordschleife Master
Joined: Jan 2003
Posts: 8,498
Likes: 28
From: North Dakota
I agree with this. Do everyone's lungs a favor and keep your cats, or get sport cats. On a 993TT, a cat bypass (along with a muffler bypass) is OBNOXIOUSLY loud. I'm not sure what it will sound like on a 993NA, or what mufflers you are using.
Thread Starter
Instructor
Joined: Dec 2010
Posts: 134
Likes: 0
Ok, thanks for all the replies, I have stock mufflers and stock cats. I want a little more "bite" from the sound. How much do fisters stgII's run, is it better to buy new or used, I'm on a pretty tight budget since I'm going to school right now.
Thread Starter
Instructor
Joined: Dec 2010
Posts: 134
Likes: 0
I would like to try to not annoy my neighbors TOO much, I think the Stage II's are a perfect balance, from what I've heard, if anyone is up for meeting up so I could hear them in person, I'd appreciate it, but from what I've heard, the stage II sound like what I'm looking for.