MAHLE F31903 EXHAUST MANIFOLD TO UP-PIPE GASKET FOR 01-16 GM DURAMAX

Product Description

Stop exhaust leaks at the manifold-to-up-pipe junction with the MAHLE F31903 gasket for 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Built to OE specs with a robust embossed steel construction, F31903 restores clamp load and sealing integrity through repeated heat cycles—perfect for stock, tow, and work-truck duty.

Mahle F31903 gasket, Duramax exhaust manifold to up-pipe gasket, GM 6.6L LB7 LLY LBZ LMM LML exhaust leak fix, Mahle Duramax exhaust gasket, CPP Diesel Mahle F31903, GM 97188685 equivalent, beaded steel gasket Duramax

Fitment

• 2001–2016 Chevrolet Silverado 2500/3500 HD — 6.6L Duramax LB7/LLY/LBZ/LMM/LML
• 2001–2016 GMC Sierra 2500/3500 HD — 6.6L Duramax LB7/LLY/LBZ/LMM/LML
• Also used on related GM 6.6L diesel applications (see OE reference GM 97188685)

Cross-Reference / Alternatives (Mahle on CPP Diesel only)

• MAHLE F32918 — Up-Pipe to Turbo Gasket (01–16 Duramax)
• MAHLE MS19398 — Exhaust Manifold Gasket Set (01–16 Duramax)
• MAHLE C31900 — Thermostat Housing Gasket (01–16 Duramax)
• MAHLE MS19402 — Intake Manifold Gasket Set (01–05 Duramax)

Notes

Many technicians replace both manifold-to-up-pipe gaskets and the up-pipe-to-turbo gasket during service. Verify quantity and side coverage for your repair.

FAQ

Will F31903 fit all 2001–2016 Duramax engines?

Yes. It covers LB7, LLY, LBZ, LMM, and LML 6.6L engines when used at the manifold-to-up-pipe flange.

Is it sold as a single gasket or a pair?

The CPP listing indicates a package quantity of two (pair). Always confirm cart quantity at checkout.

What OE number does this replace?

Common OE reference is GM 97188685.

What material is used?

OE-style embossed/beaded steel for reliable sealing through thermal cycles.

Specifications for Mahle F31903