Weistec M156 Camshaft Phaser Bolts Mercedes-Benz W204 C63 AMG 2008-2014

M156 / M159 Camshaft Phaser Bolts

If you’re working on your M156 or M159 engine, you might have noticed that the cam phasing gear is attached to the camshaft without a keyway. This means it relies solely on clamping force to keep everything in sync. Unfortunately, the factory cam bolts are "torque to yield," which makes them quite weak and less reliable.

Why Choose Weistec?

To tackle this issue head-on, Weistec presents the M156 / M159 Camshaft Phaser Bolts. Crafted by ARP, these bolts are designed to be twice as strong as the original factory options. With the Weistec M156 Camshaft Phaser Bolts, you can rest assured that your phasers will stay securely bolted to the camshafts, providing a much stronger clamping force that prevents any unwanted spinning.

Perfect for Your Upgrades

Whether you’re installing Weistec CNC Ported Heads, putting together a fully built engine, or simply upgrading to M159 valve buckets, these bolts are an essential addition to your project.

Features

• 200,000 PSI tensile strength
• Direct replacement for M156 engines—just bolt them in!
• Increased clamping force on the phaser to camshaft connection, eliminating any chance of spinning
• Reusable design, unlike the factory bolts that are meant for one-time use

Fitment

• Mercedes-Benz W219 CLS63 AMG (2007-2010)

Upgrade your engine with confidence and enjoy the peace of mind that comes with using Weistec’s high-quality camshaft phaser bolts!

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