I tell U what not to buy and that is a Mallory. I bought it on eBay and I installed it about a year later and it leaked like a sieve. Talked to Mallory in NV and they said your bad waited too long buy a gasket kit they must have dryed out. Did that paid air freight cause none was local and guess what leaked just as bad. I think the billet is porous!! Called Mallory they said they will replace it would take a week. Just bought a Kirban worked first time never a problem and it has been on for 6 mo now!