GM part # meaning please

[Keith B.]

Can anyone tell me what GM part #3877215 refers to please. Is it for a 65-67
side exhaust pipes???? I knew I should have bought a parts # book sometime ago........Thank-you...cheers/

[Wayne M.]

LH '66-67 327 side exhaust for 2 inch manifolds

1965 side exhaust small blocks had the 2.5 inch exh. manif. and used 3872971-2 (LH-RH) muffler/pipe.

[Keith B.]

Re: LH '66-67 327 side exhaust for 2 inch manifold

Thanks Wayne: This number I noted is different than the SB # you listed.

Part # 3877215 is the one I'm curious about, I have a 66 BB 427 car and want to know if this part # will fit???

[John H.]

Re: LH '66-67 327 side exhaust for 2 inch manifold

3877215 is a left-hand 2"-outlet small-block sidepipe; won't work for your car without major surgery and inlet pipe fabrication.

[Wayne M.]

You'll need 3845735-6 for L-R '65-67 BB's *NM*