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Mopar
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Discussion Starter #1
I have seen factory turbocharged cars like the Supra and RX7 experience good performance gains with an aftermarket downpipe. Is there an aftermarket downpipe for the SRT-4 yet? If so, what kind of gains? How much $$$?

Interested for Mopar...
 

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I have the ATP stage 1 kit that includes 3" d/p and cat. It seems to have given it more torque, but not really any more HP. I dragged my buddies SRT from a stop and pulled him about a car and half. And that was right away, after we got going we where locked that far apart. We also dragged a few times from 10-20 mph, and I would almost always put 1-2 cars on him. He is a better driver than me, and when we switched cars, he in my car put 3 cars between me in his car.

Steve
 

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Mopar
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Discussion Starter #5
I'd take that kind of torque any day...

Very cool...

The dyno charts on ATP's site were impressive...especially considering the torque numbers.
 

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Yeah,...I just have to cough up the money to get my car on a dyno, I really want to find out what its putting out....
 

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So you both are running with the cat and not the race pipe?

That wasn't out when I had my race pipe made and it only cost me $65, But I've been thinking about getting the ATP down pipe w/ cat and the race pipe. It does get a little load for running around town. :wink:
 

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I dont have the race pipe, just the cat in its place. It is louder than stock, but certaily liveable. And it snap, crackles, and pops a whole lot more!! How is the response from the car with your local made race pipe? I noticed a big difference in 5th gear at about 70 mph, floor it and it rockets off.....
 

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If you think yours snaps, crackles and pops you should hear mine. The response is smother, and I do think that the turbo spools up alittle quicker. But I would like to tone down the volume a bit for road driving.. :wink:
 

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I have the ATP downpipe, race pipe and hi-flo cat. The race pipe is great, but loud. The cat is needed for in-town driving, unless you like attracting the local law enforcement. :wink:

Anyway, they both make a big difference. I did notice however, that the exhaust manifold is narrower than the downpipe now. It would be nice to have a bigger manifold. I don't know what the technical ramifications of that would be with a turbo, but it seems like it would be good.
 

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When you install the racepipe, it will not be the same as installing the atp setup. The atp is a 3" pipe if i recall which will outflow the stock DP and a racepipe by a long shot if its not a larger diameter. If you just made a piece to replace your stock setup, then i would assum that its only 2.25"? You will notice a big difference with a downpipe on over stock.

WIth my full 3" turbo back system, I put 3 car lengths on my buddys srt. We started in 4th gear at a 4krpm start.
 

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Is there an aftermarket downpipe for the SRT-4 yet?
Wouldn't you guys know this already from your "product competition" marketing research?
 

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Exhaust Depot said:
When you install the racepipe, it will not be the same as installing the atp setup. The atp is a 3" pipe if i recall which will outflow the stock DP and a racepipe by a long shot if its not a larger diameter. If you just made a piece to replace your stock setup, then i would assum that its only 2.25"? You will notice a big difference with a downpipe on over stock.

WIth my full 3" turbo back system, I put 3 car lengths on my buddys srt. We started in 4th gear at a 4krpm start.
I know that :wink: but I had it made before one was availible just to tide me over, It is acually a 2 1/2" flex that we used and the race pipe has a slight taped at the rear flange.

And yes I know that the ATP will WAY out flow and perform what I have, but my bud also made mine in an hour so I get what I pay for. (AT least for now :wink: )
 

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Mopar
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Discussion Starter #17
Our project manager knows all about the competitive landscape within the aftermarket. I am not the product manager for Mopar. I was just merely asking to see what you guys were using/buying.

Anyone take a Db reading yet of the downpipe with hiflow cat?
 

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3 inch DP , 3 inch Cat and 3 inch exhaust (Cat-back) BJ thats all :wink:
 
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NeonDan
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