ARP Pro Series Main Bolt Kit Hex For 02-14 Subaru WRX/ 04-20 STi EJ205/EJ257 2012-2015 Honda Civic 2021–2025 BMW M4 Competition xDrive

2021–2025 BMW M4 Competition xDrive 3

Emission Code: 7

Dyno-Proven Gains up to +15 HP and +23 Lbs

(1) Hardware Kit (Bolts

15684 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow’s 1-year limited finish warranty and limited lifetime construction warranty

ARP Pro Series Main Bolt Kit Hex For 02-14 Subaru WRX/ 04-20 STi EJ205/EJ257 2012-2015 Honda Civic 2021–2025 BMW M4 Competition xDriveTake your Subaru EJ series engine build to the next level with ARP Pro Series Main Case Bolts. Engineered from premium 8740 chromoly steel and heat treated for ultimate strength, these bolts are built to withstand the extreme forces of high performance and forced induction setups. Featuring rolled threads after heat treatment and generous under head radii, ARP bolts deliver superior clamping force, fatigue resistance, and long term reliability over