MAHLE HS4021 HEAD SET FOR 1994–1998 GM 6.5L DIESEL (STANDARD OUTPUT)

Product Description

Don’t trust a tired, shrunken factory gasket set when you reseal your 6.5L. The MAHLE HS4021 head set is an OE-quality upper engine gasket kit built specifically for the 1994–1998 GM 6.5L Diesel Standard Output (VIN S, non-H.O.). Solid-core composite head gaskets, steel exhaust manifold gaskets, and molded-rubber intake gaskets deliver a tight, reliable seal so your work truck, tow rig, or fleet vehicle holds compression and coolant under load.

Mahle HS4021 head set, GM 6.5L diesel head gasket set, 1994 1995 1996 1997 1998 Chevy GMC 6.5 head gaskets, standard output VIN S gasket kit, Mahle composite head gaskets, upper engine gasket set 6.5L, CPP Diesel Mahle HS4021, cylinder head gasket set non HO, 757522714457, 00757522714457

Fitment

• 1994–1998 Chevrolet & GMC trucks with 6.5L Diesel (Standard Output, VIN S)
• Intended for non–High Output (non-H.O.) 6.5L applications
• Some catalogs list coverage into 1999 STD-output trucks – always verify by VIN and engine label

What You Get

• Pair of solid-core composite cylinder head gaskets
• Steel exhaust manifold gaskets
• Molded-rubber intake manifold gaskets
• Upper-engine seals needed to complete a cylinder head service

Note: Head bolts/studs, exhaust pipe gasket, and positive-type valve stem seals are not included.

Cross-Reference / Related MAHLE Parts (CPP Diesel Only)

• MAHLE HS4021A HEAD SET – 1992–2000 GM 6.5L DIESEL (H.O. / WIDE COVERAGE)
• MAHLE 4021 CYLINDER HEAD GASKET – 1994–2002 GM 6.5L DIESEL
• MAHLE 4021T CYLINDER HEAD GASKET (0.010" THICKER) – 1994–2002 GM 6.5L DIESEL
• MAHLE 95-3461 ENGINE GASKET SET – 1994–2000 GM 6.5L DIESEL
• MAHLE CS3678A LOWER ENGINE GASKET SET – 1994–2002 GM 6.5L DIESEL

FAQ

Will HS4021 fit my truck?

If you have a 1994–1998 GM 6.5L Diesel Standard Output (VIN S, non-H.O.), HS4021 is the correct head set. If your truck is the High Output version or falls outside this range, step up to MAHLE HS4021A and verify by VIN.

What’s included in the MAHLE HS4021 head set?

HS4021 includes composite head gaskets for both banks, steel exhaust manifold gaskets, molded-rubber intake manifold gaskets, and related upper-engine seals needed to complete head service. Head bolts/studs and exhaust pipe gasket are not included.

Do I need to replace my head bolts?

Yes, MAHLE and most professional engine builders recommend replacing torque-to-yield head bolts during any head gasket job, or upgrading to quality head studs for performance or heavy towing applications.

Does this kit work on High Output (H.O.) 6.5L engines?

No. HS4021 is cataloged for Standard Output VIN S engines. High Output applications use different part numbers – refer to MAHLE HS4021A and verify your VIN/RPO code before ordering.

Specifications for Mahle HS4021