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Old 01-30-2008, 05:03 PM   #1
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Default maybe stupid question about dp.

i am about to order a tony dp and 2.5 cat. Now i use stock greddy and a after marked exhaus which is a bit louder than stock, but still only 2 inches or maybe a bit less.. I also have a 2 inch test pipe. Will i feel any more power by adding the tony cat and dp or will it be the same because of the approx 2 inc catback?
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Old 01-30-2008, 05:11 PM   #2
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you will probably help your spool time by a bit but I'd go ahead and upgrade the rest. exhaust is cheap.
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Old 01-31-2008, 12:26 PM   #3
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Yes. you will definitely notice a difference. Especially because you are turbo.
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Old 01-31-2008, 01:27 PM   #4
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ok... i plan to buy a new exhaust later but want to do the most important stuff first... this months investment is the tony dp and new brakes in front... expensive hobby..
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Old 01-31-2008, 03:53 PM   #5
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I don't know of any aftermarket exaust that's less than 2". Borla NA is the smallest I know of at 2.25".

It'll be easy enough to tell. Most exahusts have the name stamped on the tips or the muffler. Take a pic for us and we'll probably be able to tell you. A test pipe will make a big difference in spool.
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Old 01-31-2008, 04:56 PM   #6
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My setup now is stock dp, 2" test pipe, and my aftermarked exhaust mhich is aprox 50mm inner diameter. I think i want to have a cat because of smog tests.
So my question was if i will notice any power gain by adding a 2.5 dp and 2.5 cat to my setup.... Will a 2.5 test pipe give much more power than a tony cat?
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Old 01-31-2008, 06:05 PM   #7
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you should, but it's a system, and you'll still have a big bottle neck, you'll notice a huge change later when you open up the rest of the exhaust.
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Old 02-01-2008, 01:39 PM   #8
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I meassured my exhaust today. Approx 48-52mm inner diameter. I think it is this one. It says BBK on the muffler. I really do not know that much about this exhaust since it was fitted by the previous owner.

Here is a link to the exhaust I have got now:

http://www.ilmotorsport.de/shop/arti...5118bb66217038
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Old 02-01-2008, 01:50 PM   #9
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its tiny. after your do the DP, you'll wanna upgrade the test pipe and catback as well.
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Old 02-01-2008, 02:29 PM   #10
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You should notice a big difference by adding the tony dp and cat even if the rest of the exhaust is stock. The stock Greddy downpipe is horrible for flow.
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Old 02-03-2008, 02:26 PM   #11
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Quote:
You should notice a big difference by adding the tony dp and cat even if the rest of the exhaust is stock. The stock Greddy downpipe is horrible for flow.
Sweet! I am about to order a dp and cat from tony now. Are there any big difference in using a tony 2.5 cat and a 2.5 test pipe?
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Old 02-03-2008, 02:43 PM   #12
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2.5 test pipe will flow better and get better spool but you won't be emissions legal.

AKA less restriction.
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Old 02-03-2008, 03:54 PM   #13
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arg.... I was thinking that the tony cat was flowing so much that it would not be a noticeable difference from a 2.5 test pipe....
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Old 02-03-2008, 08:00 PM   #14
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Well, the Tony cat will obviously flow much better than a stock cat, and a test pipe will flow even better than that.

I don't know exactly how much difference there would be between a Tony cat and a 2.5 test pipe.
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Old 02-04-2008, 12:10 AM   #15
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buy both the high flow cat, and the test pipe, then switch them out when ever you need to be emission compliant.
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Old 02-04-2008, 12:24 AM   #16
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Quote:
Originally Posted by Milton Tucker View Post
buy both the high flow cat, and the test pipe, then switch them out when ever you need to be emission compliant.
*Money*



Or borrow one.
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