Reviews for the GSC Power Division S1 Camshafts have stated that users found a noticeable difference in spool time with more power and torque across the entire RPM power band. These camshafts are great for stock turbos, and power levels around 500 WHP and below.
With that said, please note that in order to run these cams, upgraded valve springs are required for high RPM use.
RallySport Guarantee - 30 Days
Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.
RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.
The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED
QUESTIONS & ANSWERS
Q: 2015 sti gsc s1 Kadamski5140 2 years agoAnswer
Do these cams require modifying the head at all for them to fit? What types of gains should I expect with a built motor and cobb 20g?
A: These do not require machining of the heads but springs are required. These will help bring out more low end torque to mid range powerband from your vehicle.
Nick S. 2 years ago