foxmurderer
New Member
Hi guys, all new to here so just working my way around it still. I have built track cars in the past and I found good gains from modifying the inlet manifolds!! I'm just wondering has it been done on the 300 lump?? Obviousy they get all gunked up with ****e and they will always benefit from a good clean out. But I used to cut manifolds open with a band saw and then port and pollish them all out increasing the size of it slightly and allowing the air to get into the engine faster etc. Made a fair bit of difference on the ones I've done in the past I also used to do the ported and pollished butterflys and throttles.