exhaust and alternator

[suprakid91]

1. i have gone through 2 exhaust manifold gaskets, i dont know the part number but its the gasket that goes from the block to the exhaust manifold. it has blown out in the dumber 6 cylinder both times. in the same spot. i think i might have a crack there or something. or could it be too high of pressure in the # 6 cylinder? i dont have a compression tester.

2. whenever i turn up my radio too loud, it cuts out and my lights dim. is it because i have a bad or going bad alternator or could it be something with the aftermarket stereo?


anything would be great. thanks