Hey guys,

We just received the data on our WRX heads. It took about 3 pairs of heads (2 pairs destroyed ) and many hours of testing at the hands of an experienced (and certified) porting specialist but we finally did it!

We managed to make WRX heads flow about 10 to 15 cfm BETTER than the JDM V8 big port counterparts. With the smaller runner diameters and better flow rates, you will be looking at more flow at higher velocities. Bottom line? Since heads are where most of the top end gains come from these heads will make much MORE power

We will be testing these heads in the upcoming weeks on a stage 2 WRX. Stay tuned!

Here’s some pics:




These particular heads received the Gruppe-S port work with a 5-angle valve job.


Gruppe-S port work with a 5-angle valve job
$1250 labor using your heads



Regards,

Preston

Gruppe-S Engineering
29150 Simms Ct.
Hayward CA 94544

Phone: (510) 783-5300

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

 

Nice, does that quote include the removal of the heads??

 

any recommended valvetrain packages other than that JUN that would go well with these heads?

 

That would really depend on application, best bet would be to call the shop to discuss options.

Mike

 

Yes it does...

With a tool usage fee of $1300 to be added to the total

 

:runs to garage, grabs files and begins porting is heads:

:banana: <--gwen stefani