I'd like to know the part #'s for the following,

1)GM metal header gaskets(will these work with MAC headers?)
2)LT4 KM
3)Fuel Filter (or what other brand do you use?)

Also, should I bother replacing my o2sensors when I do my headers? They have approx 40,000miles on them.

Thanks

 

LT4 Knock Module P/N 16214681

 

Sure, snag the easy one.

Fuel filter
ACDelco Part Number: GF578
GM Part # 25121293

exhaust manifold gasket
GM PART # 12552469
(don't know if that is the one you want, but it is the only GM gasket listed) You should be able to get a similar gasket at any auto supply, like in the Felpro brand.

 

...and you'll never guess where I found that part number...

 

Thanks for the help guys!

 

Now those others have been added, so it will be easier for you next time.