VRP M156 Rod bolts

Good call — the audience is someone who’s already in the motor (bearing service, head bolt job, build) and needs to not go back in with the same weak hardware they came out with. Here’s the revision:

VRP 8740 Rod Bolt Kit — Mercedes-AMG M156 6.2L V8

Long Description:

The Rod Bolt Upgrade Your M156 Needs

If you’re opening up your M156 bottom end, the factory connecting rod bolts should not go back in. The OEM rod bolts are torque-to-yield — they permanently stretch during installation and are engineered as single-use, disposable hardware. They were designed for stock duty, not for an engine that sees high RPM, track use, or any level of modification. Reinstalling used TTY rod bolts — or even new ones of the same design — is leaving the weakest link in your rotating assembly untouched.

The VRP 8740 Rod Bolt Kit replaces all 16 factory rod bolts with premium 8740 chrome moly steel fasteners rated at approximately 200,000 PSI tensile strength. The 8740 alloy delivers significantly higher fatigue life than the OEM fasteners, meaning more consistent clamping force on the rod cap through thousands of high-RPM cycles. This is critical on the M156, where the large 102mm bore and 7,000+ RPM redline put enormous cyclic loads on the connecting rod assembly.

No one else makes a standalone rod bolt upgrade for the M156. Until now, your only options were going back in with disposable OEM bolts or spending thousands on a complete forged rod and piston kit just to get better fasteners. The VRP 8740 Rod Bolt Kit fills that gap — drop-in fitment on your factory rods, no machine work, no modifications. If you’re already in there, do it right.

Replaces the following OEM part numbers:

• Primary OEM Part Number: A1560380471 (156-038-04-71)
• Superseded/Alternative OEM Number: A2760380071 (276-038-00-71)
• Notes: 2 bolts are required per connecting rod (16 total per engine)
• Application: Covers M156 6.2L V8 engines (C63, E63, CLK63, ML63, S63, SLS AMG)

Key Features:

• 8740 Chrome Moly Steel: ~200,000 PSI tensile strength, far exceeding factory rod bolt specifications.
• Reusable: Unlike factory TTY hardware, 8740 bolts can be reinstalled if the engine is serviced again in the future.
• Direct Replacement: Drop-in fitment on factory M156/M159 connecting rods — no machine work or modifications.
• Higher Fatigue Life: 8740 alloy delivers dramatically better cycle life than OEM fasteners under high-RPM loading.
• Only Standalone Kit Available: The only M156 rod bolt upgrade on the market that doesn’t require purchasing a complete rod and piston assembly.

Kit Contents:

• 16x VRP 8740 Chrome Moly Rod Bolts

Fitment:

• Mercedes-Benz C63 AMG — M156 6.2L V8 (W204, 2008–2015)
• Mercedes-Benz E63 AMG — M156 6.2L V8 (W211/W212, 2007–2011)
• Mercedes-Benz S63 AMG — M156 6.2L V8 (W221, 2007–2011)
• Mercedes-Benz CL63 AMG — M156 6.2L V8 (C216, 2007–2011)
• Mercedes-Benz CLS63 AMG — M156 6.2L V8 (W219, 2007–2010)
• Mercedes-Benz CLK63 AMG — M156 6.2L V8 (W209, 2007–2009)
• Mercedes-Benz ML63 AMG — M156 6.2L V8 (W164, 2007–2011)
• Mercedes-Benz SL63 AMG — M156 6.2L V8 (R230, 2009–2012)
• Mercedes-Benz R63 AMG — M156 6.2L V8 (W251, 2007)
• Mercedes-Benz SLS AMG — M159 6.2L V8 (C197/R197, 2010–2015)