Hey guys,

We're running an install special for Helix downpipes (Catless & Catted).

Helix Catless Downpipe 02+ WRX/STI
$349 Installed OTD (includes tax)!



The Helix Downpipe is the optimal downpipe for the performance minded Suby owner. This downpipe features a cast bellmouth which provides the absolute maximum exhaust flow and minimum back pressure by allowing the wastegate gases to exit without disrupting normal exhaust flow. The piping is full 3" Stainless Steel (304) polished, and the package includes gaskets & bolts. This downpipe replaces both cats and is designed for USDM fitment only. The combination of the Helix uppipe, downpipe, and exhaust system will yield 30+whp!


Helix High-Flow Catted Downpipe 02+ WRX/STI
$499 Installed OTD (includes tax)!



The Helix Catted Downpipe incorporates Helix Power’s first-rate bell-mouth downpipe, with the addition of a 200 cell Metal-Substrate high-flow catalytic converter and thermal barrier heat-shield. The 200 cell Metal-Substrate downpipe has been tested by us to yield 7-10whp over the factory twin cats, while able to pass stringent California smog standards on the WRX / STI. The thermal barrier heat-shield assists in rapid warm-up of the cat for maximum efficiency and helping to reduce engine bay temperatures.

Please contact us for ordering information!

Thanks,
Preston
Phone: (510) 783-5300

We Accept Paypal!
Paypal: sales@gruppe-s.com
When ordering w/ paypal, please include the following:
product name: XXXX
sales rep: Preston/Geoff
Price including shipping: $XXXX
Shipping address.

 

We have a few turboback install combos as well.


HKS Carbon Ti w/ Helix Catless or Catted Downpipe
-Carbon muffler and Titanium tip
-Aggressive tone.
-Full stainless mandrel bent piping.
$1150 Installed w/ Catless DP
$1250 Installed w/ Catted DP



Greddy SP2 w/ Helix Catless or Catted Downpipe
-One of the quietest exhausts on the market
-Full 3" piping
-Full stainless madrel bent piping
$899 Installed w/ Catless DP
$999 Installed w/ Catted DP


Thanks,
Preston
Phone: (510) 783-5300

We Accept Paypal!
Paypal: sales@gruppe-s.com
When ordering w/ paypal, please include the following:
product name: XXXX
sales rep: Preston
Price including shipping: $XXXX
Shipping address.

 

bump !

 

What kind of gains can one expect on an 05sti with just the downpipe? and downpipe with tuning?

This is for the catted downpipe specifically.

thanks,

 

I would say 7-10 whp for just the downpipe and 15-20whp with tuning.

Thanks,
Preston