Momentum Worx ISX "Big Betty" Injector Camshaft | DOHC CM570 / CM870 / CM871 | MMWX.4101432

The "Big Betty" ISX Injector Camshaft is a direct-replacement injector cam designed for Cummins ISX engines equipped with the DOHC / dual-cam cylinder head.

Designed as a replacement for Cummins 4101432 and 3682142, Big Betty provides a direct-fit solution for compatible ISX applications without changing the engine's factory injector cam configuration.

Because every good Chunky Charley needs a Big Betty.

Direct-Fit Injector Camshaft

Unlike the valve camshaft, the injector cam controls the mechanical actuation of the fuel injectors on DOHC ISX engines.

Big Betty is designed as a straightforward replacement for worn, damaged, or failed factory injector camshafts.

It features:

• Designed for Cummins ISX DOHC / dual-cam engines
• Compatible with CM570, CM870, and CM871 applications using this injector camshaft
• Designed to work with the factory injector camshaft system
• Installs as a drop-in replacement
• Uses the factory-specified injector cam timing wedge

No special aftermarket timing wedge is required — installation uses the factory-specified injector cam timing wedge for your engine application / CPL.

No wild tricks. No complicated conversion.

Just a big injector cam named Betty.

Fitment

Cummins ISX DOHC / Dual Cam Engines

• CM570 Signature 600 applications using 4101432 / 3682142
• CM870
• CM871

Important CM570 Fitment Note

CM570 applications can vary.

Big Betty is intended for CM570 Signature 600 applications equipped with the 4101432 / 3682142 injector camshaft.

Verify your engine configuration, Engine Serial Number, and/or existing camshaft part number before ordering.

Pair It With Chunky Charley

Replacing or upgrading the valve cam at the same time?

Pair Big Betty with the Momentum Worx MMWX.4298626 "Chunky Charley" Valve Camshaft for compatible Cummins ISX DOHC applications.

Chunky Charley Valve Camshaft – MMWX.4298626