We at Gruppe-S have built, assembled, installed, and tuned hundreds of high performance race engines. We certify our engines to be free of any defects, tolerance issues, and assembly problems.

Due to the nature of racing engines and racing vehicles, Gruppe-S offers start-up warranty only on our race engines. The majority of engine problems occur due to shipping damage, poor installation procedures, or improper tuning.

If you suspect your engine does have a warranty issue, you must send your engine back to us for inspection. If we do determine your engine to have a warranty issue, we will reimburse for any related shipping charges as well as cost of repair.

Gruppe-S is liable for shipping charges within the continental United States only. Gruppe-S is not liable for any other charges associated with warranty including tuning or installation charges. You can search www.nasioc.com for customer feedback regarding the success of our Subaru race engines.