Pro Series N55 OEM Cylinder Head Stud Set - E82 E90 F10 F30 - M135i 335i 435i 535iX 640i 740i
Upgrade your BMW N55 engine with the Pro Series 18.8 Cylinder Head Stud Set. This high strength, German-manufactured head stud kit is designed to replace the original cylinder head bolts on tuned and high performance N55 builds. A proven solution to head lift under high boost and sustained track use, these reusable N55 head studs deliver reliable clamping force and long term durability. Ideal for BMW M135i, 335i, 435i, 535i, 640i, 740i and more across E82, E90, F10, F30 platforms.
We use this Pro Series 18.8 N55 head stud kit on our own builds and customers have been consistently impressed with the fit, finish and performance. If you are looking for BMW N55 head studs, N55 head bolt upgrade, N55 cylinder head stud kit or OEM replacement N55 head studs, this set is the dependable choice.
Why upgrade your N55 head bolts
- Prevents cylinder head lift when increasing power and boost pressure
- Maintains stable clamping force under extreme thermal and load cycles
- Reusable after disassembly, unlike many OEM torque-to-yield bolts
Key features
- Pro Series 18.8 steel with tensile strength of 1850+ N/mm² - 270,000+ PSI
- Threads are formed, not cut - rolled threads increase flank strength by around 30 percent
- Nickel coating provides long term corrosion protection in harsh conditions
- Internal hex drive on the stud head for easy installation
- Cone seat on block side supports in the bore rather than on thread flanks - protects engine block threads during repeated rebuilds
- Matching nuts and washers included, also with 1850 N/mm² tensile strength
- Manufactured in Germany to a high standard for performance and reliability
What’s included
- 4 x stud bolts M9
- 10 x stud bolts M11
- 4 x nuts M9
- 10 x nuts M11
- 14 x washers
- Assembly paste
- Assembly instructions
Compatibility - BMW N55 engine models
Direct fit N55 head stud kit for the following BMW models and chassis:
- 1 Series - E82 E88 135i - F20 F21 M135i M135ix - F20 LCI F21 LCI M135i M135ix
- 2 Series - F22 F23 M235i M235ix
- 3 Series - E90 LCI E91 LCI E92 LCI E93 LCI 335i 335xi - F30 335i 335ix Hybrid 3 - F31 335i 335ix - F34 GT 335i 335ix
- 4 Series - F32 F33 F36 435i 435ix
- 5 Series - F07 GT 535i 535ix - F07 LCI 535i 535ix - F10 535i 535ix Hybrid 5 - F10 LCI 535i 535ix Hybrid 5 - F11 535i 535ix - F11 LCI 535i 535ix
- 6 Series - F06 Gran Coupé 640i 640ix - F06 LCI 640i 640ix - F12 640i 640ix - F12 LCI 640i 640ix - F13 640i 640ix - F13 LCI 640i 640ix
- 7 Series - F01 LCI 740i Hybrid 7 - F02 LCI 740Li 740Lix Hybrid 7L
- X Series - X1 E84 35ix - X3 F25 35ix - X4 F26 35ix - X5 E70 LCI 35ix 40ix - X5 F15 35i 35ix - X6 E71 35ix 40ix - X6 F16 35i 35ix
Specifications
- Tensile strength: PS 18.8 steel - 1850+ N/mm² - 270,000+ PSI
- Finish: Nickel coated
- Threads: Rolled
- Reusability: Yes
- Part number: P102061410
Fitting and support
Professional installation is recommended for best results. We offer fitting at Nforcd in Warwickshire - request a quote via Sales@nforcd.com. If you would like us to confirm fitment, enter your vehicle registration number UK or the last 7 digits of your VIN at checkout and we will run a compatibility check before dispatch.
Search friendly terms
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Brand
Pro Series