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      10-10-2010, 01:20 AM   #1
Tonester
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RENN-Spec | Photos/Video of Akrapovic GT4 System!!

We got in one of the first GT4 systems in the states and we quickly went to work to get this system on Constantin's car. We went ahead and wrapped the rear sections around the diff/axle shafts with heat wrap to keep the temps down in that area.

This exhaust is for "race use only", it does not have o2 bungs for the post cat o2 sensors, nor does it have any cats/resonators. As usual the quality of the Akrapovic system is amazing, even though the GT4 system is hand made the fitment is still perfect!

Constantin's car is equipped with an ESS supercharger system, you can hear the supercharger whine faintly in the background. The exhaust note sounds much better in person, the video doesn't capure the sound too well with all the wind noise.

















Last edited by Tonester; 10-10-2010 at 02:14 AM.
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      10-10-2010, 02:08 AM   #2
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nice.

your youtube link did not appear in your post:
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      10-10-2010, 02:14 AM   #3
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dang, looks awesome. great work guys. What side skirt is that on the E90 M3?
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      10-10-2010, 03:14 AM   #4
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Heard this exhaust in person, it's definitely

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Originally Posted by Johnny Lin View Post
dang, looks awesome. great work guys. What side skirt is that on the E90 M3?
Hamann.
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      10-10-2010, 03:54 AM   #5
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can you buy this exhaust in the state?
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      10-10-2010, 12:45 PM   #6
Johnny Lin
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Quote:
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Heard this exhaust in person, it's definitely



Hamann.
I sure it does, wish I can hear it too. Thanks for answering my question.

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Originally Posted by bapesta206 View Post
can you buy this exhaust in the state?
Anything for you bro, ha.
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      10-10-2010, 02:14 PM   #7
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damn its pretty straight kit..
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      10-10-2010, 04:13 PM   #8
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How much gain and weight do you save over stock? Also, how does this differ from the regular Evo system?
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      10-10-2010, 04:32 PM   #9
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      10-10-2010, 04:54 PM   #10
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nice, sounds great!
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      10-10-2010, 06:11 PM   #11
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Absolutely Sick setup! Straight pipes and super light is the best of both.

I'm curious to see how much power this setup would make over the Akra with HFC. The key is the weight savings though!


Well played!
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      10-11-2010, 11:55 AM   #12
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I have these mids and they made quite a bit of power over my catted challenge
But this with the Eisenmann is extremely loud, not so much in the cabin though as I expected which is very good
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      10-11-2010, 02:30 PM   #13
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how much is it?
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      10-11-2010, 02:35 PM   #14
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Quote:
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how much is it?
Same price as the EVO system
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      10-11-2010, 02:58 PM   #15
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Quote:
Originally Posted by bapesta206 View Post
can you buy this exhaust in the state?
Yes, we carry this exhaust system.
Quote:
Originally Posted by lux View Post
How much gain and weight do you save over stock? Also, how does this differ from the regular Evo system?
I really wished we did some weight comparison for this system but we didn't. I also don't have any info on the gains on this car.
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Originally Posted by LV-E92M3 View Post
how much is it?
Quote:
Originally Posted by Mavrick151 View Post
Same price as the EVO system
This system actually retails for $1,000 over the regular Evo system.
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