Machined Tappets

If you’ve encountered the rare CP3 clearance issue where the new shaft won’t rotate a full 360° due to manufacturing variances these pre-machined tappets are your quick and clean fix.

Each set has been precision-machined to reduce height by ~0.5mm, eliminating interference with the shaft. Just swap them in using our CP3 Tappet Tool (required for removal), and you’re back in business. No guesswork, no grinding.

What’s in the Box?

• 3x Machined Tappets

Key Features:

• Direct replacement for OEM tappets

• Pre-machined to spec (–0.5mm height)

Fits:

• 2007.5-2025 6.7 Cummins (not retro-fitted from CP4 pumps)

• 2006-2010 Duramax LBZ/LMM

Exchange your stock tappets, install these, and you’re good to go. Fast, simple, and way easier than machining your own.