ARP BMW E46 M3/S54 Main Stud Kit arp201-5002

*Main Studs* There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others. *Main Bolts* Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under-head radius and rolled threads for the utmost reliability. The threads are rolled after heat-treating, which makes them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 psi, is a premium replacement for OEM fasteners, or the 200,000 psi nominal rated Pro Series, application-specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel-ground, hardened washers are included with each kit.


M3646

🏄‍♂️ ARP Main Stud Kit – BMW E46 M3 / S54 (Part #: arp201-5002)| M3646

Lock it down before you rev it up. Whether you're tracking corners or just redlining on the freeway, this ARP Main Stud Kit is the bulletproof bottom-end upgrade your S54 needs. Say goodbye to stock hardware and hello to crankshaft clamping force that won't let go.

🔧 Fitment:

• BMW E46 M3

• Engine: S54 3.2L inline-6

📦 What's in the box:

• Complete set of ARP 2-bolt main studs, nuts, and washers

• Heat-treated, 8740 chrome moly steel for serious strength

• Comes in a tight box: 8.6" x 4.1" x 2.4" (Weight: 2.6 lbs)

🌊 Why You Need This:

You’re building for boost, high RPM, or just peace of mind? Then it’s time to ditch those factory main bolts and go ARP. These studs anchor your crankshaft caps like reef anchors in heavy surf — no drift, no flex, just locked-in stability.

⚙️ Details:

• Part #: ARP 201-5002

• Manufacturer: ARP

• Category: Main Stud Kits

🏁 Bottom Line:

When you're chasing revs and laying rubber, your crank better stay locked tighter than your favorite surfboard leash. The ARP 201-5002 main stud kit is the go-to for keeping your S54's bottom end rock solid under pressure.