Re: Aftermarket...
tons. everything from airbreathers to superchargers.
just do a search on any particular item you think you want to upgrade, and chances are, the company makes a marine version of whatever you want.
holly makes marine carbs and fuel pumps, whipple makes marine superchargers, K&N makes marine flame arestors, etc etc etc.
the internals of your engine are all automotive to begine with. for instance, the cam shaft, pistons, rods, berings, lifters, rockerarms are all the same as high performance auto applications.
sooo, you need to be a bit more spacific as to what you want, or, get to googeling.
