Product Description

ARP 100-7533 VALVE COVER BOLT KIT – 12-POINT FOR 2004.5–2016 GM 6.6L DURAMAX

Upgrade the sealing reliability of your GM 6.6L Duramax with the ARP 100-7533 12-point valve cover bolt kit. Precision-machined from 8740 chromoly with a black oxide finish, this kit delivers consistent clamp load for leak-free covers and long-term durability. Designed specifically for DURAMAX VALVE COVER BOLTS, ARP DMAX 12-POINT HARDWARE, CPP DIESEL ARP 2004.5–2016 LLY/LBZ/LMM/LML engines, these compact 12-point heads simplify access around obstructions and ensure uniform gasket compression. Pair with ARP Ultra-Torque® 100-9909 for accurate torque values and repeatable installation results. GM 6.6L LLY LBZ LMM LML, BLACK OXIDE 8740 CHROMOLY, HIGH TENSILE FASTENERS

Fitment

• GM 6.6L Duramax LLY — 2004.5–2005
• GM 6.6L Duramax LBZ — 2006–2007
• GM 6.6L Duramax LMM — 2007.5–2010
• GM 6.6L Duramax LML — 2011–2016

Application coverage per CPP Diesel product listing for ARP 100-7533.

WHAT MATERIAL ARE THE BOLTS?

8740 chromoly steel with a corrosion-resistant black oxide finish for high tensile strength and consistent clamping. :contentReference[oaicite:2]{index=2}

DO I NEED ARP ULTRA-TORQUE LUBE?

Yes—using ARP Ultra-Torque helps you hit the correct torque value and achieve repeatable results. We recommend ARP 100-9909. :contentReference[oaicite:3]{index=3}

WHAT IS THE TENSILE STRENGTH?

Rated up to 170,000 PSI (substantially stronger than Grade 8 hardware). :contentReference[oaicite:4]{index=4}

WILL THESE FIT EARLIER LB7 ENGINES?

No—use the earlier kits for 2001–2004 (LB7). See Cross-Reference for compatible ARP options on CPP. :contentReference[oaicite:5]{index=5}

Cross Reference & Related ARP Products (CPP Diesel)

• Alt. head style (HEX) for same years: ARP 100-7534 Valve Cover Bolt Kit – HEX
• Duramax head stud upgrade: ARP 230-4201 Head Stud Kit (2001+ Duramax)
• Assembly lubricant for accurate torque: ARP 100-9909 Ultra-Torque

Specifications for ARP 100-7533