ARP Main Stud Kit — Honda/Acura B18 & B20

ARP Main Stud Kit — Honda/Acura B18 & B20

The ARP 208-5403 Main Stud Kit is a premium upgrade for Honda and Acura B18 and B20 DOHC engines. Manufactured from 8740 chromoly steel and heat-treated to deliver exceptional strength, these studs secure the main bearing caps more effectively than OEM bolts, ensuring reliability under high-RPM and high-stress conditions.

Key Features:

• Designed for Honda/Acura B18 and B20 DOHC engines

• Stud material: 8740 chromoly, heat-treated to 190,000 psi tensile strength

• Precision-rolled threads after heat-treatment for superior fatigue resistance

• Includes hardened, parallel-ground washers and 12-point nuts

• Black oxide finish for corrosion resistance

• Socket sizes: 1/2″ 12-point and 3/16″ Allen

• Complete kit with all required hardware

Uses / Applications:

• Replaces OEM main bolts with stronger studs for increased durability

• Prevents main cap walk and fretting in high-RPM or high-boost builds

• Protects block threads by using stud installation rather than repeated bolt torqueing

• Essential upgrade for turbocharged, high-compression, or motorsport engines

Engine Fitment:

• Honda B18A / B18B

• Honda B18C (GSR / Type R)

• Honda B20B / B20Z

Installation Notes:

• Always clean and chase block threads before installation

• Use ARP Ultra-Torque or equivalent assembly lubricant

• Torque studs in sequence to ARP’s specified values for consistent preload

Factory Part Number: 208-5403