okay on thursday i was doing an oil pan gasket and new oil pan right.. and i had to drop downpipe transmission plate and subframe.. well after reassmebly everything 3.5hrs later i can hear a leak and smell it right where the downpipe meets up to the header.. is there a gasket i forgot to put don't think it has one. i know the other end that goes to the cat has a gasket.. anyways the 3 14mm bolts are freaking tight so i don't get it.. is it a big deal if its leaking a little will i run rich?