Industrial Injection 6.6L Duramax Stage 2 Camshaft DMXHP

Stage 2 Performance Camshaft for 6.6L Duramax

The Industrial Injection 6.6L Duramax Stage 2 Camshaft DMXHP provides a performance camshaft option for Duramax diesel engine builds. Industrial Injection gives the Stage 2 camshaft .450-inch intake lift and .450-inch exhaust lift. Additionally, the camshaft features .258 intake duration and .268 exhaust duration.

Unlike the Stage 1 drop-in camshaft, the Stage 2 requires additional attention to piston-to-valve clearance. Therefore, Industrial Injection recommends a .080-inch piston valve relief for this camshaft. More importantly, installers should always measure actual piston-to-valve clearance during installation.

A $250 core charge applies to the DMXHP. Additionally, Industrial Injection requires the qualifying core back within 90 days for full core credit.

Duramax Stage 2 Camshaft Specifications

Industrial Injection designed the Stage 2 camshaft with specific lift and duration measurements for performance Duramax applications. Because internal engine clearances can vary, installers should verify all required measurements before final assembly.

Key Features

• Designed for 6.6L Duramax diesel engines
• Industrial Injection Stage 2 camshaft
• Part number DMXHP
• Manufacturer part number PDM-DMXHP
• .450-inch intake lift
• .450-inch exhaust lift
• .258 intake duration
• .268 exhaust duration
• Recommended .080-inch piston valve relief
• Minimum .080-inch intake piston-to-valve clearance
• Minimum .120-inch exhaust piston-to-valve clearance
• $250 core charge applies
• Core must return within 90 days for full credit

Check Piston-to-Valve Clearance

Industrial Injection recommends checking piston-to-valve clearance whenever you install an aftermarket camshaft. Therefore, installers should physically measure the available clearance rather than relying only on listed specifications.

Industrial Injection recommends at least .080 inch of intake clearance and .120 inch of exhaust clearance. Additionally, the company recommends .080-inch piston valve relief for the Stage 2 camshaft.

Because proper clearance plays an important role in engine assembly, always verify these measurements during installation.

.450 Lift Intake and Exhaust

The DMXHP uses .450-inch lift on both the intake and exhaust sides. Meanwhile, Industrial Injection specifies .258 intake duration and .268 exhaust duration.

These specifications separate the Stage 2 camshaft from Industrial Injection’s Stage 1 option. Therefore, customers should choose the camshaft that matches their specific engine build and required internal clearances.

$250 Core Charge Applies

A $250 core charge applies to the Industrial Injection Stage 2 Duramax Camshaft. Customers can pay the core charge when ordering and return the old camshaft afterward. Industrial Injection will then refund the applicable core charge after the returned core passes inspection.

Alternatively, customers can send their core before Industrial Injection ships the replacement. However, this option can delay the order, and inventory may change while Industrial Injection waits for the core.

90-Day Core Return Requirement

Industrial Injection requires the qualifying core back within 90 days of receiving the order for full credit. Therefore, customers should return the original camshaft as soon as possible after completing the installation.

Industrial Injection may reduce or deny core credit when a returned core fails its inspection requirements. Additionally, customers remain responsible for return freight and any shipping damage.

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