Downpipe question

[Revolver Ocelot]

I was contemplating on which size downpipe to get. From what ive read so far a 2.75" downpipe will clear everything nicely on my IX with no spacers or anything like that. And a 3" will work but i will have to use the spacers and it will be awfully close to the oil pan.
So to my main question: "Who here is actually running a 2.75" downpipe and if you do, do you regret not going with a 3" instead?

[EVO GRIM]

I ran a 70mm on my black 03 and now a 76 on the silver one. Cant realy say theres much difference. Maybe better torque on the 70mm.

[gbpkr]

I am running the 70 mm Works downpipe on my 05 MR. No rubbing or bumping. I don't regret not going with a 76 mm because I don't think I'll ever be making enough power to tell the difference.

If you see the new Sportcompact Car mag, they have an 05 MR with a 70 mm downpipe from RRE. RRE has been tuning Mitsu's for years and they really know these cars.

I don't think it makes that much of a difference until you really are building a no longer street legal monster (550 whp +). Then the 70 mm pipe might be holding you back.

Plus, the 70 mm pipe matches flow better with the stcok O2 housing.

[xevilxviiix]

i have tanabe 2.75" on my IX MR. fits like stock. very nice peice. wont be making enough power to really notice the difference between 2.75 and 3"

[Unowned]

i have Evo Grim's 70 MM DP now and it feels great, no need to hit up a larger DP unless you have a GT30+ turbo

[byt]

I'm running the Tanabe 2.75" as well on my 05. No clearance issues! 8)

[earlyapex]

I run a 2.75" Espelier downpipe and I doubt I would pick up any power going to a 3" with my setup.

[Revolver Ocelot]

Thanks guys. Thats what i really wanted to know. So basically until i run pretty much 550+ HP or a Gt35R, the 2.75" should be more than enough right.

[Revolver Ocelot]

Ok another question. For you guys that used the 2.75" downpipe. Did you go with 3" from there on? For example a 3" test pipe.

Also i was looking on Lancershop and noticed that they sell a Ultimate Racing 3" test pipe and it says "Guaranteed not to set off a CEL". There is also a Perrin Test Pipe that comes with an O2 simulator which in turn does not set off a CEL. MY question is why does the UR test pipe not set off a CEL without the use of a simulator.

Sorry for the long question guys.

[boost]

does the 76mm works dp require spacers also? i've never seen anyone mention that it does.

[L84AD8]

does the 76mm works dp require spacers also? i've never seen anyone mention that it does.

Nope. Fits like a glove! :wink:

[EVO GRIM]

The test pipes that dont put out cels have a fix that doesn't put the 02 sensor in the path of the exhaust, but its an easy fix to buy 2 antifoul kits from local parts store.

[xevilxviiix]

im using tanabe dp, magnaflow 3" hfc, and 3" catback

[Jamie@WORKS]

does the 76mm works dp require spacers also? i've never seen anyone mention that it does.

Nope. Fits like a glove! :wink:

Yeah, what he said :)

We've found the 70mm piping is fine for those who aren't planning on changing the stock turbo and/or O2 housing. Our 76mm pipe is designed in conjunction with the WORKS O2 housing and both offer OEM fitment and reliability. If you go with a larger turbo, you may want to get the 76mm to start with--besides the larger piping is actually less expensive. Going with a much larger turbo (ATP, Garrett, etc...) usually involves a custom DP to mate with the new component.

[Revolver Ocelot]

So your downpipe has no clearance issues at all with an 05+ ACD equipped Evo or an MR?

[dohcvtec]

So your downpipe has no clearance issues at all with an 05+ ACD equipped Evo or an MR?
My good friend has the Works DP on his 05 MR, fits perfectly.

[Gruppe-S]

I have the Tanabe DP on my car and it works great. The stock turbo won't push enough exhaust gas for a 76mm. If you were going for a bigger turbo like a GT30...99% of the kits on the market will come with its own 3"dp.

Thanks,
Tom

[lqdchkn]

Here's the quote from RRE. "Espelier Stainless Steel 2.75" down pipe. OMG! It's only 2.75" diameter! ¡Que horríble! Yeah, you will be limited to about 600 hp with "only" a 2.75" down pipe."

[Revolver Ocelot]

Cool, so i pretty much narrowed it down to either the Tanabe from Lancershop for $240 or the Espelier from RRE for $210. If there are no quality differences between the two, Iam proably going to go with the one from RRE.

[MarkSAE]

Get the tanabe. The Espelier downpipe has a paper thin flange at the cat.

[Revolver Ocelot]

Alright heres hopefully my last downpipe question. Hopefully. I can get either the Tanabe or the DC sports cat delete for the same price. But the DC will save money by not having to buy a test pipe. Are there any downsides really of running a straight cat delete compared to a downpipe and test pipe setup? In your guys opinion which way would you go: DC cat delete or Tanabe+Test pipe? for a 9 MR.

[evo_dadi]

tanabe+test pipe so just in case you get into trouble you can pop back your stock cat :wink:

[earlyapex]

A downpipe with cat delete all-in-one is just such an obvious thing if people look at it.

I would go 2-piece.

[Revolver Ocelot]

The cheap-ass in me wants the cat delete but then i can also see the hassle of having to change the whole downpipe if i need to put the stock cat back on. So it looks like iam going to go with the Tanabe+ UR Test pipe(Since test pipes are just a piece of metal right)+ A Greddy Ti catback(if my hookup comes through with it). Does that sound like a decent setup?

[L84AD8]

The cheap-ass in me wants the cat delete but then i can also see the hassle of having to change the whole downpipe if i need to put the stock cat back on. So it looks like iam going to go with the Tanabe+ UR Test pipe(Since test pipes are just a piece of metal right)+ A Greddy Ti catback(if my hookup comes through with it). Does that sound like a decent setup?

Sounds more than decent! :wink: 8)

[Steiner]

The cheap-ass in me wants the cat delete but then i can also see the hassle of having to change the whole downpipe if i need to put the stock cat back on. So it looks like iam going to go with the Tanabe+ UR Test pipe(Since test pipes are just a piece of metal right)+ A Greddy Ti catback(if my hookup comes through with it). Does that sound like a decent setup?
It works for most of us. I have the Tanabe DP, feeding into a 3" UR HFC hooked up to a 3" RSR ExMag. If you end up changing your mind and going with the DC Sports piece shoot me a PM. I know a guy who works for them.