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Engines and Components› Cylinder Heads and Components

ARP

11mm M156 Engine Head Studs

Name: 11mm M156 Engine Head Studs
Brand: ARP
SKU: 006-0406-0103

$2,099.99 $1,454.99 Save $645.00

SKU: 006-0406-0103

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Overview

The ARP Head Studs are designed as a direct replacement for factory M156 head bolts. These 11mm studs are made of 625 grade Inconel to handle extreme cylinder pressures. They are a popular upgrade for the M156 Engine, particularly for early models prone to head bolt damage.

Show original supplier description

The ARP Head Studs are engineered as a direct replacement for the factory M156 head bolts, representing a sought-after upgrade for the M156 Engine. These 11mm studs are fabricated from high-strength 625 grade Inconel, specifically designed to handle the extreme cylinder pressures found in performance applications. Given that early M156 engines are prone to head bolt damage in their factory state, this kit also serves as an excellent option for direct replacement. Included in this kit are twenty ARP 625 Grade Inconel Head Studs, twenty ARP Head Stud Washers, and twenty ARP Head Stud 12-Pt Nuts. Proper installation requires the use of silicone sealant. These head studs are compatible with a wide range of Mercedes-Benz models equipped with the M156 6.2L V8 engine, including various C63, CL63, CLK63, CLS63, E63, ML63, R63, S63, and SL63 models from approximately 2006 through 2015. Please refer to the specific fitment chart for exact year and model compatibility.

Vehicle Symptoms

Coolant loss without external leak
Rough idle or misfire on cold start
White smoke from exhaust on startup
Overheating with no sign of radiator leak
Tick or knock noise from top of engine

Diagnostic Codes

P0300 – Random or multiple cylinder misfire
P0301 – Cylinder 1 misfire Det
P0302 – Cylinder 2 misfire Det
P0303 – Cylinder 3 misfire Det
P0304 – Cylinder 4 misfire Det

Relevant Conversations

M156 head bolt failure symptoms
white smoke from exhaust M156
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cost to replace head bolts on M156
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P0300 M156 what causes it
best head stud kit for M156 engine
M156 head bolt torque specs ARP
ARP 006-0406-0103 install guide

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	ARP
Part Number	006-0406-0103
Category	Engines and Components

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