Inline PRO K20C1 M-series M11 Xtreme Duty Head Stud Set | 17-23+ Civic Type R FK8 & FL5, 23+ Integra Type S DE5

Fits:

• 2017 - 2021 Honda Civic Type R FK8
• 2023+ Honda Civic Type R FL5
• 2023+ Acura Integra Type S

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Inline Pro machines these from a premium American alloy with a minimum tensile strength of 230 kpsi, put through rigorous heat treatment and testing. Unlike L19/H11 material, this alloy isn't prone to hydrogen embrittlement, so you're not handling these studs worried about a hidden failure point down the road.

The true-beam design runs the full length of the stud without necking down or undercutting like a lot of competing studs do, which translates directly into better clamping force and more reliable torque values — genuinely important for a head gasket that needs to seal consistently under high boost.

Kit Includes

• Studs, nuts, and washers
• Lubricant
• Installation instructions

Features

• 230 kpsi minimum tensile strength, premium American alloy
• Resistant to hydrogen embrittlement (unlike L19/H11 material)
• True-beam design, full length, no necking or undercutting
• Improved clamping force and torque reliability