Which downpipe to get?

[psbfan]

Which downpipe will work with Blitz nur spec exhaust and hopefully no CEL problem.....

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[dman918]

I love my Perrin. If you are looking catted, it is by far the best IMO. Catless would be Perrin or PDE.

[Chris Morgan]

Yes, I am getting a PDE 3 inch bellmouth downpipe installed very soon! Heard its the best if you have the money!

-Chris

[lawn boy]

the helix is the best for those on a budget. stainless steel and a bell mouth

[Greg 99]

I think HKS is best bang for buck. You don't need a bellmouth downpipe unless you are running high amounts of boost. Save your money and buy an up pie with the difference.

thanks,
Greg

[Sandkicker]

I wouldn't know how to prove that it's the best, but i've got the twin-dump design Bosal pipe and it seems to be doing pretty well. I don't have anything to compare it to though. I got it because it would allow me to keep the 3rd cat and stock midpipe while most replace the 3rd cat as well. Probably depends on whether you care about teh last cat or not.

[lobelsteve]

My Invidia arrived today. Outstanding build quality. Won't know for a week or two when I install it if fit is right on or not. It replaces the downpipe and midpipe, includes rear gasket, has drilled and welded bung for rear O2 sensor, no cats so I'll need a mil elim.

[WuWrx]

Originally posted by Greg 99
I think HKS is best bang for buck. You don't need a bellmouth downpipe unless you are running high amounts of boost. Save your money and buy an up pie with the difference.

thanks,
Greg

[modvp]

the bosal is a good choice.

[Stavros g]

I also have a NUR spec and installed my bosal yesterday. From my research, a custom mid-pipe will be required. I would recommend a flex joint if you get one made.

The contruction was good, not GREAT. There we're some small rough spots in the polish, there we some globs of solder where the seperate pipe for the wastegate meets the main pipe.

My dealer that installed it, said it fit like a glove. no problems at all (he liked the pipe a lot).

I must say I felt the difference right away. Pull into the RED like a champ.

For 225us @ stranoparts I believe it's great bang for the buck.

BTW.... the NUR spec is even LOUDER. Hard to believe but true. Don't lose you're silencer like I did.

[CRXguy]

Originally posted by WuWrx

x2

[AK_2002_WRX]

does the Bosal need a CEL eliminator? i'm going to order a bosal DP sometime soon. and maybe a stromung 3rd cat eliminator.

how do u guys like the bosal DP?

[thetikler1]

bump!

[mlambert]

Originally posted by AK_2002_WRX
does the Bosal need a CEL eliminator? i'm going to order a bosal DP sometime soon. and maybe a stromung 3rd cat eliminator.

how do u guys like the bosal DP?

yes it needs one, all downpipes that remove cats need one...especially if you remove the 3rd cat!

[SLowery]

I was thinking Bosal too and leaving the 3rd cat. Will I be missing out on significant gains by leaving the 3rd cat?

-Slowery

[Brewmaster]

Ive run the APS for 10 months and no cel's

[Sandkicker]

Originally posted by SLowery
I was thinking Bosal too and leaving the 3rd cat. Will I be missing out on significant gains by leaving the 3rd cat?

-Slowery

I've got the Bosal and left the 3rd cat. I think replacing the 3rd cat and midpipe will help add more power, but i'm not sure how much.

for reference, i've got a catless PDE uppipe and the prodrive muffler, bosal downpipe and stock mid&Cat pipes (no other power mods) and on a dyno run pulled 197 HP & 203 ft/lbs torque at the wheels... i think that's soemthing like 255-260hp @ the crank i think...

I think replacing the stock cat/midpipes would add a bit more torque... but i have no idea how much.... maybe someday i'll swap those out and do another dyno run.... but that'll be some day down the road.

[SLowery]

sandkicker,

Are you happy with the sound and build quality?

[Sandkicker]

Yeah, I'm stoked on it. Build quality was awesoem... I'm no welder though, but the build quality looked good. I'm into the twin-dump design too... I'm not sure if it can be proven better, but i have yet to see anyone prove that it's a "BAD" idea.... so i figure it can only help. And it sounds like the twin-dump idea will come in handy if i ever go to a bigger turbo.

I'm not sure what you want to know as far as sound though, i don't have much to compare it too other than stock, but replacing the stock downpipe (with it's cat and all the shielding on the pipe) definitely allows you to hear the turbo and air-flow a bit more. I think it sounds cool. But if you want it to sound like you're sitting in a nice cooshy quiet BMW (where you can't hear/feel the engine at all), then you don't want to replace the downpipe (or anything else on the exhaust, i guess)... Not that it makes it a LOT louder, but you can hear many more sounds than you did before.

[SLowery]

thanks for the info. As far as I'm concerned sound is a good thing, unless it's whiny. A good heavy pipe should make a throaty sound, a thin pipe probably won't sound as good...... I guess that's what I was trying to assertain. I'm the kind of guy that doesn't even play music half of the time when I drive because I like the way my car sounds......

-Slowery

[03 Silver Bullet]

I've got me a PDE. No CEL from cat inefficiency code yet.

Looks nice, sounds mean. And you can hear that turbo wind!

[modvp]

I got a CEL with my Bosal. I installed the "resistor mod" and all is fine after 5000 miles.

[AK_2002_WRX]

if i have my stock up pipe and stock third cat still in place, will i pass emissions with the bosal DP?

so is the turbo noise louder? like the whine and spool up sound? i thought an intake would give me the sounds i wanted, but it wasnt enough

[Sandkicker]

I think you'd probably pass emissions with any 2 of the cats... unless you're in california. Some people seem to think you could pass with just 1 cat... i'm not sure though... i'll find out next month.

[Dr. Zevil]

Originally posted by jimgldn
Ive run the APS for 10 months and no cel's

This is without the resistor fix? I was thinking about going APS, but I wasn't sure yet. I was also considering TXS. Please post more comments about your APS stuff!