As with all engine seals, the #8 bearing crankshaft seal is a critical component in the battle against leaky engines. Installed improperly on a new rebuild, or mangled when going through trying to re-seal an engine, the #8 crankshaft seal is repeatedly the source of oil leaks. The #8 seal is an intricate device with multiple sealing surfaces and components- and an especially delicate internal compression spring. If the ID of the seal or the spring are compromised at all when installed over the crankshaft snout, you are asking for a leak (and potentially scaring of the crank snout itself when the spring is displaced). STOMSKI RACING’s SR054 provides a smooth, seamless transition for the #8 seal to pass over the end of the crank, thus putting the odds in your favor that the seal will accomplish its task.