Review Circuit Werks Test Pipe
#1
Circuit Werks Test Pipe
I had the opportunity this past weekend to install my test pipes. I bought them from Circuit Werks. They are marketed as anti-reversion. They are non-resonated. I bought these for $140 shipped off Ebay. I have a tune session on August 18th and wanted to upgrade as much of the exhaust as I can. These are paired with Motordyne xyz pipe and Topspeed-like exhaust, (I bought the car with the exhaust and unsure what the brand is. Its about 2.375" inner diameter).
Having driven this setup for about a week now, the volume of the exhaust isn't too loud, even on cold start. It has a deep tone, however has a hiss during heavy acceleration, but not on decel. There is no rasp or drone. You can hear the exhaust from inside the cabin but just enough and having a conversation is very easy.
Circuit Werks 'Anti-Reversion' Test pipes. Its came with all gaskets, O2 extension / anti-fouler fitting, and just the 6 bolts/nuts to connect to the headers. I had to reuse my hardware at the y-pipe end.
Side by side comparison of the test pipes vs the OEM cats.
Test pipes installed on the car. Fitment was good. I had to adjust my y-pipe connection a couple of times to keep it from hitting my transmission crossmember. I currently have it where it doesn't touch it but it is low enough that I scrap on it over speed bumps.
The O2 extensions / anti-fouler were used to keep from getting the CEL.
Having driven this setup for about a week now, the volume of the exhaust isn't too loud, even on cold start. It has a deep tone, however has a hiss during heavy acceleration, but not on decel. There is no rasp or drone. You can hear the exhaust from inside the cabin but just enough and having a conversation is very easy.
Circuit Werks 'Anti-Reversion' Test pipes. Its came with all gaskets, O2 extension / anti-fouler fitting, and just the 6 bolts/nuts to connect to the headers. I had to reuse my hardware at the y-pipe end.
Side by side comparison of the test pipes vs the OEM cats.
Test pipes installed on the car. Fitment was good. I had to adjust my y-pipe connection a couple of times to keep it from hitting my transmission crossmember. I currently have it where it doesn't touch it but it is low enough that I scrap on it over speed bumps.
The O2 extensions / anti-fouler were used to keep from getting the CEL.
Last edited by projectpanda13; 09-12-2018 at 08:41 AM. Reason: added video
The following users liked this post:
blnewt (08-06-2018)
#2
So what did you end up making for power? Also how are you liking the test pipes? I bought a set a month or so ago and haven’t put them on as of yet just curious as to if you’d recommend them or not
#3
For the money I paid for the test pipe, I like it. Its holding up fine, the flex section is still in good shape, no cracks on any welds. I have been recommending it to people due to the price point and the anti-reversion feature. Hope this helps. Let me know if you've got other questions.
Latez
#5
The pipes are still holding up for me. Its been through plenty of rain and some light snow in Atlanta and hasn't caused any CEL for me. I checked the welds when I was installing my Motordyne exhaust recently and it was fine. I am definitely happy with the happy, but I may be swapping it for ART pipes in the future to match the exhaust.
#10
#11
Super Moderator
iTrader: (2)
What exhaust are you running with them? I had the Top Speed Y back paired with an aftermarket Y pipe and the rasp was unbearable for me after install. Put the stock Y back on and it cleaned it up a bit but it was still very much there over 3k RPMs. Got to the point I was barely accelerating when taking off. Installed Vibrant ultra quiet resonators and the rasp is completely gone but the sound is basically quieter than stock. I was running 4 resonators total plus the mufflers. Recently deleted the mufflers to see if that helped and the deep growl and volume is back with no rasp.
#12
What exhaust are you running with them? I had the Top Speed Y back paired with an aftermarket Y pipe and the rasp was unbearable for me after install. Put the stock Y back on and it cleaned it up a bit but it was still very much there over 3k RPMs. Got to the point I was barely accelerating when taking off. Installed Vibrant ultra quiet resonators and the rasp is completely gone but the sound is basically quieter than stock. I was running 4 resonators total plus the mufflers. Recently deleted the mufflers to see if that helped and the deep growl and volume is back with no rasp.
#13
Super Moderator
iTrader: (2)
That makes sense. I had the hiss you mentioned but the rasp was so bad that I didn't even bother making a video after install. The Y-pipe I picked up wasn't resonated so that would explain why mine sounded noting like yours after install. Your set-up produced what I was aiming for; figured they were similar so it would be achieved or close. I couldn't have been more wrong.
#14
Hey guys,
I'm running the TP'S an eBay y pipe, and topspeed y back. I do have some vibrations which I believe are just due to needed to adjust placement. It's got a VQ rasp for a few hundred RPM at times but I actually like the way it sounds. Overall I love it. I'm trying to get a bunch of footage together and make a vid of coldstart with revs, driving normally and fast, and highway !
I'm running the TP'S an eBay y pipe, and topspeed y back. I do have some vibrations which I believe are just due to needed to adjust placement. It's got a VQ rasp for a few hundred RPM at times but I actually like the way it sounds. Overall I love it. I'm trying to get a bunch of footage together and make a vid of coldstart with revs, driving normally and fast, and highway !