Product Description
MAHLE 4021T is a composite cylinder head gasket engineered to OE specifications for the 1994–2002 GM 6.5L diesel. The “T” variant is 0.010" thicker than standard to help compensate for minor machining or deck clean-up while maintaining reliable sealing under boost. GTIN: 027067193339.
- Material: Composite with steel core (OE-style)
- Thickness: +0.010" “T”-thick variant
- Sold individually (V8 requires quantity 2)
- Meets or exceeds OEM specifications
- 1-Year limited warranty
Fitment
- 1994–2002 Chevrolet/GMC trucks and vans equipped with the 6.5L turbo diesel (V8)
- Includes common 6.5L applications such as C/K 2500–3500 pickups, Express/Savana vans, and related 6.5L platforms (verify by engine).
Cross Reference / Alternatives
- MAHLE (standard thickness): 4021
- Fel-Pro: 9521PT (standard thickness reference)
- UPC/GTIN: 027067193339
FAQ
Will this gasket fit any 6.5L?
It’s designed for GM 6.5L diesel applications from 1994–2002. Always verify by engine and model year before ordering.
What does the “T” mean on 4021T?
“T” denotes a +0.010" thicker head gasket compared to standard 4021, helpful when heads/blocks have been resurfaced within spec.
Do I need two gaskets?
Yes. The 6.5L is a V8—order quantity 2 for a full engine service.
Is this MLS?
No, it’s an OE-style composite gasket with a steel core engineered for reliable sealing on the 6.5L.
Are head bolts included?
No. Gasket only. Use new head bolts or studs per GM/Clevite/MAHLE recommendations and follow torque/angle specs.
