Semi Truck Engine Oil Filter Bypass Valves

By-Pass Oil Filter System by Sinister Diesel®. The oil system in your engine is crucial to the trucks performance and life. Keeping your oil clean is what it all comes down to. The Sinister oil filter kit is here to do just that. This...

By-Pass Oil Filter System (SD-EOF-5.9-06) by Sinister Diesel®. Keeping your oil clean is what it all comes down to. The Sinister oil filter kit is here to do just that. This adds the best oil filter available on the market with our...