Hello guys,

We here at Gruppe-S would like to introduce a Power Package for the EVO market!
The Gruppe-S Power Package #1 was designed to provide the best "power for the dollar" solution to entry-level power modifications. After extensive testing, we carefully selected a parts combination that will yield the maximum amount of power without sacrificing drivability, reliability, or your wallet! We found that because of the stringent emissions regulations in the US, significant power can be made with the stock turbo by simply allowing your Evolution to breath better. The combination of the Helix cat delete, downpipe, and cat-back exhaust system yields an incredible hp gain (15%!!) for the Evo. As can be seen from the dyno graph, with our Power Package 1.






Helix 03-04 EVO Downpipe $229 shipped!

Helix 03+ Cat-back $449 shipped!

Helix test-pipe $139 shipped!

Special Helix turbo-back for 03-04 EVO COMBO offer $799 shipped!!!


Hurry! This special offer will end soon! Please give us a call!


Thanks you

Cal
gruppe-s
510-498-8400


**Note**
This product is intended for Off-Road Use only. It can never be used upon a public Highway.

 

Holy smokes! I just recieved my order today! The craftsmanship of this system is simiply amazing! very straight! hardly any bends! I can't wait to put this on and take some pictures! Thanks Gruppe-S!

PBF

 

forgot to mention, it comes with all the installation hardwares (new gaskets, bolts and nuts!) for fast easy install! I will take some pix when im done!

PBF

 

Hey Thanks for the order! Please feel free to ask any questions and post pix of our products!

For those of you interested or have questions regarding this product, please feel free to give us a call at the shop! Our sales reps are standing by!

Thank you

Cal
gruppe-s
510-498-8400

 

Just wondering...does the exhaust tip exit straight or angled? Also, if I run the test pipe will I need some type of CEL fix? One more thing, do you have any db numbers for the complete exhaust (NO CAT)? Thanks for the time.

 

the exhuast tip come out angled,.....you dont need a CEL fix because there is a place to put the o2 sensor(if you look at the picture you'll see where the 02 sensor goes,....and i believe with a S-AFC, you could run up to anywhere from 40-50 WHP....hope that helps your questions..

 

if not....you could always call Gruppe-S...with their awesome customer service...

 

Thanks for the 411 Nvs...Do you have the Helix exhaust? Also I think if a Cat DELETE pipe is used O2 sensor or not it WILL throw a CEL. That rear O2 would be going crazy!

 

The test pipe has a mechanical fix to eliminate the CEL. You basically remove the secondary o2 sensor from the mid-pipe of your exhaust to the o2 sensor placement on test pipe (extending o2 sensor wires is required. Color coded wirings are included with the package). Plug the o2 sensor bung of the mid-pipe w/ the bolt we provide, and BAM! You are ready to enjoy instant 10whp!

hope this clarify some of your questions!

Thanks

Cal
gruppe-S

 

im just waiting for my delete pipe, and mines will become turbo back....:ioi:

 

oops....wrong letters

 

Is the downpipe Ver. 1 or Ver. 2 from Helix?

 

Version 2.

 

do you still have the cat delete pipe and downpipe from helix still in stock?

 

Hello, Yes plenty in stock of everything! Please give us a call for questions and order while supplies last!

Thank you!

Cal
Gruppe-S
510-498-8400