39 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFabspeed muffler bypass - Bad idea?
Leading reported evidence
Install cat bypass pipes
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I posted a short video on youtube before and after I installed cat bypass pipes.
Leading evidence: 'Install cat bypass pipes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check other vids there are about 6 or 7' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I ran bypass for a little while before I got my full Fabspeed exhaust.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I'm running cat bypass pipes with stock manifold and mufflers.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
a low price for real fabspeed USED pipes is 2-3x what they charge for new.....
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
39 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T175704Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I want to hear a throaty exhaust but not aggravate the neighbors. Project is a 2000 C2, all stock, no PSE. I found some youtube clips of the Fabspeed muffler bypass pipes but that idea sounds like i might regret all the noise. I saw the mod for welding up a PSE pipe and i'm willing if that is going to be the best. Opinions?
by-pass pipes are VERY LOUD and drone like crazy in your cabin. I loved the sound but removed mine after 4 days... just too loud. Sound bytes dont give you the "real feel"
here is a vid of my PSE hack - check the other vids there are about 6 or 7
and a link to the hack
rennlist link
plenty of reading there - PS my hacked cans are dead silent in the neighborhood and at cruising rpm's but growl beautfully when the windows are open or I step on it... very subtle and nice
GL,
Ed
No way I'd run them every day. Last year I kept them on for a week after one of my track days and couldn't stand driving the car on the street like that. It's soo loud that you just tip-toe around everywhere and don't even get to enjoy the car without being heard for blocks.
I gotta talk to my sweety... that is sounding rather interesting!!
Hunny......all the guys say its fun..... can you do it for me PLEASE......come on... P L E A S E ! !
Thanks for the link Ed. Sounds like I can improve what i got with the PSE mod, but I may fall short of the sound my buddies GT3 makes. Life continues to offer me trade offs........
I did appreciate the "get rid of the muff" humor that followed though. Sounds like i don't need a impact wrench as much as a Gillete Mach 4, and i"ll only be half as dirty.
Is anyone running stock headers, Fabspeed's cat bypass pipes and their mufflers? I know it throws a CEL but what is the sound, power delivery like with no cats? Thoughts?
I don't think that would be worth it by itself.
Haf the benefit of doing aftermarket exhaust is weight savings, the stock cans are about 20lbs each.
Also, bypass pipes are interesting and fun, but don't pay Fabspeed's inflated price. There is a good seller on eBay that has beautiful stainless with tips, they're essentially identical to Fabspeed bypass at half the price.
I ran bypass for a little while before I got my full Fabspeed exhaust.
PM me if anyone's intersted, they are crazy fun a while, or good for track days.
I'm running cat bypass pipes with stock manifold and mufflers. The sound is pretty good with no droning issues. I used the spacesr that Fabspeed sells to back the O2 sensors out of the direct exhaust flow and the CEL only comes on once in a while; usually with a warning that my O2 sensors are "aging". I reset it with Durametric software
Just my $0.02, but I found the Fabspeed muffler bypass pipes to be too loud. I replaced with stock mufflers with the PSE mod. I loved the exhaust note, but my wife and the neighbors didn't appreciate it late at night or early in the morning.
Leigh2,
Are you running cat bypass pipes all the time or just on the track?
Also, you are spacing just the secondary sensors (not the pre-cat sensors), correct?
Thanks.
Franklin
I posted a short video on youtube before and after I installed cat bypass pipes. I have stock headers. I do not have fabspeed mufflers however I have the PSE mod. The video isn't the best however it gets the job done.
http://www.youtube.com/watch?v=UlcBhv6rue8
Prior to getting the cat bypass pipes, I had the muffler bypass pipes. I loved them however they were simply too loud. I thought that it was simply a matter of time before I got a citation. The cat bypass pipes are fairly quite at idle however they can get loud when the engine is pushed. In my opinion, that is perfect.
hey if anyone wants to sell me their used bypass pipes, let me know.
I was considering buying them off ebay for 150 (even though I know i will probably regret it for being too loud lol).
I could pay 100 shipped and paypal the money.
Let me know. Thanks!
The drone is a bit much, but does calm down after warming up the car. Starting the car up cold is impressive. The sound while accelerating is very nice.
I have had mine for @ 6 months now. It is nice shedding those two heavy mufflers: I took them off and installed my Fabspeed muffler delete pipes so I know how much weight those mufflers represent.
When I get a chance to I am going to ship my mufflers to be converted by FisterD then reinstall the mufflers.
I'll post up a video in a little bit of my car. 997S X51 headers, Fabspeed GT3 Cat Bypass Pipes, Fabspeed GT3 Muffler Bypass Pipes. Just firing it up cold and letting it idle to let you see what it sounds like.
IMHO, it is LOUD and only for the track. In fact if the DB meter was in use this past weekend I was told I would have failed. I will be going back to just the Cat Bypass pipes and Fabspeed Mufflers and use that 100% during track season. This setup is pretty quiet at idle and when just cruising around but the volume does go up nicely with more throttle and rpms.
The full bypass scenario definitely gives the car some more pull at the top end based on my lap times and top speeds but the early morning noise when I fire it up is too much when I leave for a track day. Now if I was towing it would be a different story.
Other benefit to full bypass is lower engine bay temps (something I monitor closely at the track). The cats and mufflers are huge heat sinks that retain and put off a lot of extra heat.
Well considering there are ebay ones for 140 (that are axactly the same as fabspeed), I thought 100 was a fair asking price.
Plus, if you have no use for them, you might as well sell them.
But if you really paid 600 form fabspeed, I can understand where you are coming from.
the ones on ebay are fairly well made. I bought a set they used for the video sound bytes and they sold them for a bit less then thier regular price. That said, they are not Fabspeed.
a low price for real fabspeed USED pipes is 2-3x what they charge for new.....
Next time just say "muffler by-pass pipes" and leave out the "brand names"
GL w/ oyur search
BTW if you want to "TRY" this before you buy it, there is a really cheap ($20) autozone part that will work for the trial to see if you want to go ahead and buy them. (in my case, I removed them after about a week)
Hahaha, you have got to be kidding. This sounds like the sort of thing I need to buy on the way home and install overnight just to scare the hell out of the wife.
The cheapest I have seen knockoffs (read NOT same) as the Fabspeed ones are $170. And understand they are NOT Fabspeed units, so NO they are not EXACTLY the same. You really should do some research before you start making those claims. Material, bends, diameter, length, etc, are all crucial.
A quick check of the Fabspeed website and you would see what they cost.
This is a source reference. Confirm exact model applicability in the original material.
