Down-Pipes Question

[NJ135]

for those of you who have intalled downpipes.. what kind did you install and how does it sound in comparison with a completely stock exhaust.. im wondering if im going to here much of a difference once i get mine

[jeremyc74]

There's absolutely a difference in the sound, especially when you nail it and the exhaust butterfly in the muffler opens up. I'm running catless pipes and the stock exhaust from there back, and I really like the way it sounds. I like that the car is still very close to the stock noise levels inside while cruising on the highway and around town, but then has a very growl when it's at WOT.

From what I've seen so far, the power gains from changing the rest of the exhaust system are minimal, so mine will probably stay just like it is.

[SV Concepts III]

I am running the Riss Racing Catless DPs along with the Riss Racing Cat Back Exhaust. The car is an absolute beast with this setup. I don't have comparison with just DPs as they were all installed together but the car is mean to say the least. We'll do a video later on to give you an idea.

[NJ135]

ooo thanks.. hopefully i get some soon.. bouta check out youtube and see if anyone has any stock exhaust clips with DPs

[TMc135]

Jeremy - what brand downpipes did you go with? Any issues when you bring it in for service or having no cats present any issues? Sounds like an interesting option (that would save quite a bit of money but provide more mean sound without drone I would assume). Thanks!

Originally Posted by jeremyc74

There's absolutely a difference in the sound, especially when you nail it and the exhaust butterfly in the muffler opens up. I'm running catless pipes and the stock exhaust from there back, and I really like the way it sounds. I like that the car is still very close to the stock noise levels inside while cruising on the highway and around town, but then has a very growl when it's at WOT.

From what I've seen so far, the power gains from changing the rest of the exhaust system are minimal, so mine will probably stay just like it is.

[Papa13]

Originally Posted by NJ135

for those of you who have intalled downpipes.. what kind did you install and how does it sound in comparison with a completely stock exhaust.. im wondering if im going to here much of a difference once i get mine

It sounds the same except it sounds like it will take your lunch money and then tie you to the flag pole.. i.e. louder, deeper and throatier. More exhaust is getting out.. You will dig it.

Oh and they are RR catless coated pipes

[jeremyc74]

Originally Posted by TMc135

Jeremy - what brand downpipes did you go with? Any issues when you bring it in for service or having no cats present any issues? Sounds like an interesting option (that would save quite a bit of money but provide more mean sound without drone I would assume). Thanks!

I've got Ultimate Racing pipes, but I doubt there's really much difference in sound or performance from manufacturer to manufacturer, only build quality, and that's a subject for another thread.

Putting catless DPs on the car can absolutely void the warranty if you have something turbo related and they know about them. If you're running the O2 simulators required to prevent a constant SES light, there's also the risk of them finding them and denying claims because you've tampered with the ECU wiring, so like any other mod that's worth a significant power gain, they're certainly not without risk no matter what some of the venders will tell you.

As far as the sound goes, I think it's perfect, but there are people out there who like it a little louder under normal conditions, and if that's what you're after it might make more sense to go with an aftermarket exhaust, and maybe mid-pipes which replace the secondary cats instead of the primarys.

[ar design]

Originally Posted by NJ135

ooo thanks.. hopefully i get some soon.. bouta check out youtube and see if anyone has any stock exhaust clips with DPs

http://www.ardesign.info/catalog/ard...ipes-p-72.html

[Alex@AKMotorwerk]

Originally Posted by NJ135

for those of you who have intalled downpipes.. what kind did you install and how does it sound in comparison with a completely stock exhaust.. im wondering if im going to here much of a difference once i get mine

we're installing a set of AR dp's on a customer's 135 today and i believe he has stock exhaust... i can get some video/sound clips if you're interested

Let me know

[NihonX]

AR Design Catless + Riss Racing Coated Exhaust