Inline PRO K20C1 K20C4 M12 Xtreme Power Super Alloy Head Stud Set (upgrade from M11)
Inline Performance
Inline PRO K20C1 K20C4 M12 Xtreme Power Super Alloy Head Stud Set (upgrade from M11)
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Machined in Virginia
Fitment help
Description
Our Honda K20C1 K20C4 M-series M12 Extreme Power head studs are made from the Highest-Grade Super Alloy that have gone through rigorous heat treatment and testing. With a minimum tensile strength of 260kpsi, these are not prone to hydrogen embrittlement like the L19/H11 material and can be handled without worrying about failures. We use a True-beam design all the way through the length of the stud resulting in better clamping force and torque values (it's not necked-down or undercut like others). "Only settle for the Best!"
The kit includes: Studs, nuts, washers, lube, and instructions.
- Engine block must be re-threaded to accept the larger M12 stud using our custom M11 to M12 transition tap kit (sold separately).
- No modification is necessary to the cylinder head (use with stock OEM dowel pins).
Specifications
| SKU | IP-HSSA-M12K20C1 |
|---|---|
| Category | Head Studs & Main studs |
| Brand | Inline Performance |
Fitment
This part is listed for the engine families below. If your build is unusual — a swap, a stroker, an aftermarket head — send us the combination and we will confirm fitment before you order.
Shipping & Returns
Orders ship within the United States from our shop in Springfield, Virginia. Weight-based rates are calculated at checkout, with free shipping over $500.
Shipping outside the US? We do not take international orders through the website — call 703-455-5805 or email info@inlinepro.com and we will arrange the order and payment with you directly.
Returns must be approved before shipping, made within 30 days in original condition, and are subject to a 25% restocking fee. No returns on used parts, electronics or special orders.