Mosselman Oil Thermostat Titanium GR5 HEX-RACE Bolt Kit (3x M8x25) for BMW N54 N55 S55 Fits 135i 335i 435i M135i M235i M2 M3 M4

Titanium Grade 5 HEX-RACE Fixing Set for Mosselman Oil Thermostat - BMW N54 N55 S55

Unlock reliable clamping and clean torque with this premium three-piece titanium fixing set for the Mosselman oil temperature regulator. Manufactured from Ti-6Al-4V Grade 5, these lightweight, heat-stable fasteners deliver confident tool engagement and long-term resistance to corrosion in demanding engine bay conditions. Perfect for tuned road cars, track-day builds and anyone who wants motorsport-grade hardware on their turbocharged straight-six BMW.

Key benefits

• Ti-6Al-4V Grade 5 construction - high tensile strength with a significant weight saving over steel
• HEX-RACE head profile - precise tool bite for smooth, accurate torque application
• Secure, consistent clamping on the thermostat housing for leak-free operation
• Excellent resistance to heat and corrosion - ideal for repeated heat cycles
• Direct swap for factory fixings when installing the Mosselman oil temp control unit
• Built for fast road and circuit use on N54, N55 and S55 powered cars

What is included

3 x M8 x 25 mm Titanium Grade 5 HEX-RACE bolts

Vehicle coverage

• BMW 135i E82 N54
• BMW 135i E82 N55
• BMW 1M E82 N54
• BMW 335i E90 E91 E92 N54
• BMW 335i E90 E91 E92 N55
• BMW Z4 35i E89 N54
• BMW Z4 LCI 35i E89 N54
• BMW Z4 35is E89 N54
• BMW M135i F20 F21 N55
• BMW M235i F22 N55
• BMW M2 F87 N55
• BMW 335i F30 F31 N55
• BMW 335i GT F34 N55
• BMW 435i F32 F33 N55
• BMW 435i Gran Coupe F36 N55
• BMW M2 Competition F87 S55
• BMW M3 F8x S55
• BMW M3 Competition F80 S55
• BMW M3 CS F80 S55
• BMW M4 F8x S55
• BMW M4 Competition F82 S55
• BMW M4 CS F82 S55
• BMW M4 GTS F82 S55

Why enthusiasts choose this set

Our workshop has fitted these Mosselman Grade 5 titanium HEX-RACE fasteners on multiple N54, N55 and S55 builds, and customer feedback has been consistently excellent. The positive tool engagement, tidy finish and dependable clamping make this a smart upgrade when you want premium hardware for your Mosselman thermostat housing.

Installation and support

Designed for use when fitting the Mosselman thermostat assembly on N54, N55 and S55 engines. Always follow the manufacturer’s installation guidance and torque values from your service information. Prefer a professional install in the Midlands. Book with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk.

Search terms customers use

Titanium thermostat housing bolts. Grade 5 Ti M8x25 bolt set. HEX head race bolts for oil temp regulator. Mosselman thermostat fixing kit. Ti-6Al-4V bolts BMW turbo six. Titanium fasteners N54 N55 S55. Motorsport hardware for BMW 1 Series 3 Series 4 Series. 135i 335i 435i M135i M235i M2 M3 M4 titanium bolts. E82 E90 E91 E92 E89 F20 F21 F22 F30 F31 F32 F33 F34 F36 F80 F82 F87 thermostat hardware. Oil cooler thermostat bolts. Lightweight corrosion resistant engine bay fixings. BMW tuning parts UK. Warwickshire fitting. MJ Modifications.