BTR 7.400" 5/16". 080" Hardened Pushrods. BTR. 560 LS6 Beehive Valve Springs. BTR Hat Seals. BTR PUSHRODS. BTR. 560 LS6 BEEHIVE VALVE SPRINGS (16). BTR HAT SEALS (16). Brian TooleyRacing is proud to introduce the next chapter in the performance GM Truck saga.