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Old 11-25-2013, 06:19 AM   #1
xHeartcoreboyx
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Question 3" Catback - Any gains with K04?

What kind of gains am I going to see by going with an aftermarket 3" catback in my K04 setup?

I will consider a civil/quiet CB if there is any considerable gains.
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Old 11-25-2013, 07:59 AM   #2
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From what the APR tech told me when they installed my dp/ stage 2 at WF "maybe 5-8whp" on stage 2 - k04 setups, more on BT. I like the apr rsc if anything because there's absolutely no drone or howling inside the cab like some other ones I've experienced along the way. But as far as power goes, it's minimal. I'll most likely leave my stock rear muffler when going k04. The way it sounds with a. Full 3" dp into stock rear muffler is pretty aggressive.

I will try to get some vids of mine after work today. After about 20k miles it's gotten quite a bit louder (probably due to backfires destroying the packing inside the muffler itself) since it was originally flash and dp installed.
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Old 11-25-2013, 09:01 AM   #3
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i think a catback gives gains on a K04 car. It's all slight, and probably not worth the money-to-hp ratio, but every bit counts, right? I think the stock exhaust and muffler becomes a real bottleneck on a K04 car. Hell I think its a bottleneck even on a stage 2 car, but it's all about how much noise you can take.
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Old 11-25-2013, 09:38 AM   #4
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It should, I felt a slight gain even when I was stage1 and had a stock downpipe. It's not going to be huge, but the less restriction, the better. It will probably help more with throttle response and spool since the whole system will be more free flowing
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Old 11-25-2013, 09:57 AM   #5
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Butt dyno feels different. For $350 used magnaflow shipped it's worth it. Bigger pipes and less restriction than OEM, it's just what a turboed car wants, more flow.
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Old 11-25-2013, 12:06 PM   #6
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I know my full 3" catless TBE is making power on my K04 setup
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Old 11-30-2013, 04:06 PM   #7
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Bump for more input.
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Old 11-30-2013, 04:07 PM   #8
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Quote:
Originally Posted by 2013R View Post
i think a catback gives gains on a K04 car. It's all slight, and probably not worth the money-to-hp ratio, but every bit counts, right? I think the stock exhaust and muffler becomes a real bottleneck on a K04 car. Hell I think its a bottleneck even on a stage 2 car, but it's all about how much noise you can take.
Which was quieter, Neupseed or MF?
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Old 11-30-2013, 04:33 PM   #9
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Neupseed for sure, the MF sounds awesome but def.louder by not much.
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Old 11-30-2013, 04:35 PM   #10
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ya.. the neuspeed would be a hair quieter. they both might be the same volume at full throttle high rpm. but the magnaflow is a lot louder at all other times.
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Old 11-30-2013, 04:36 PM   #11
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I never noticed any improvement sitting behind the wheel but it is always nice knowing you are squeezing as much HP as possible out of your setup.
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Old 11-30-2013, 04:40 PM   #12
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I have noticed most people running the magnaflow, because it's cheap I am guessing. I have also heard of quality issues with welds, etc..

I would be paying a fairly large amount on shipping overseas, so better buy good quality stuff..

I am also looking at Miltek system.
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Old 11-30-2013, 04:46 PM   #13
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Quote:
Originally Posted by xHeartcoreboyx View Post
I have noticed most people running the magnaflow, because it's cheap I am guessing. I have also heard of quality issues with welds, etc..

I would be paying a fairly large amount on shipping overseas, so better buy good quality stuff..

I am also looking at Miltek system.
You can't go wrong with Miltek if you don't mind the price. The Magnaflow does seem to be one of the most popular due to it's price and how loud it is.
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Old 11-30-2013, 05:20 PM   #14
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Just ordered the resonated milltek TBE with 15% - Black Friday Sale, and will be importing it to Brazil.
Can't wait! IMHO milltek sounds way better than anything else out there. Let alone built quality!

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