Product Description
MAHLE HS4021 is an OE-quality cylinder head head set for the GM 6.5L Diesel Standard Output (VIN S). It includes solid-core composite head gaskets, steel exhaust manifold gaskets, and molded-rubber intake manifold gaskets, engineered to meet or exceed factory specs. Head bolts/studs are not included.
- Engine: GM 6.5L V8 Diesel (STD Output, non-H.O.)
- Materials: Solid-core composite head gaskets; steel exhaust manifold gaskets; molded-rubber intake gaskets
- Warranty: 1-Year Limited
- GTIN/UPC: 757522714457
Fitment
- 1994–1998 Chevrolet & GMC trucks with 6.5L Diesel (Standard Output, VIN S)
- Also cataloged for 1994–1999 STD-output applications in some catalogs (verify VIN/engine).
Cross Reference & Notes
- Variant: MAHLE HS4021A – for High Output (H.O.) 6.5L (use HS4021A if vehicle is H.O.).
- Retail X-refs: MCIHS4021 (common retailer SKU).
- Does NOT include: head bolts/studs; exhaust pipe gasket; positive-type valve stem seals.
FAQ
Will HS4021 fit my truck?
If you have a 1994–1998 GM 6.5L Standard Output (VIN S), yes. If your truck is the H.O. version, use HS4021A.
What’s included in the kit?
Upper-engine gaskets to complete a head service: composite head gaskets, steel exhaust manifold gaskets, molded-rubber intake gaskets, and related seals. Head bolts/studs are not included.
Is machining required?
Inspect head/block flatness and surface finish; follow GM specs. Replace torque-to-yield head bolts if reusing OEM fasteners.
What years does this cover?
Core coverage is 1994–1998 for STD-output (VIN S). Some catalogs extend to 1999 STD-output—always verify by VIN and engine label.
