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Head Stud Kit - 2008-2015 6.2L Chevrolet LSA
PART # SKU CP889
Original price
£254.00
-
Original price
£254.00
Original price
£254.00
£254.00
-
£254.00
Current price
£254.00
Availability:
Low stock
Seal the Power. Drive with Confidence.
Your truck deserves strength you can count on. This head stud kit is built for street-driven and moderately modified builds, giving you dependable sealing and confidence whether you’re daily driving, towing, or adding small performance upgrades.
Why Drivers Choose XOTIC PERFORMANCE™
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Everyday Confidence – Keeps your head gasket sealed during normal use and light performance mods.
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Trusted Reliability – Prevents common sealing issues so you can focus on the road, not repairs.
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All-In-One Kit – Includes studs, washers, and nuts, for a secure, hassle-free install.
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Durability That Lasts – Precision-machined and finished to resist wear and corrosion.
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Limited Lifetime Warranty – Backed by XOTIC PERFORMANCE™ for total peace of mind.
Perfect for drivers who want proven reliability without going overboard — this kit is your upgrade for everyday dependability.
INSTALL GUIDE
This guide covers installation of the XOTIC PERFORMANCE™ CP889 head stud kit for the supercharged 6.2L Chevrolet LSA V8 — 2009–2017 applications including the Cadillac CTS-V, Camaro ZL1, HSV GTS Gen-F, and Vauxhall VXR8, GTS, and GTS-R. Prefer a printable copy? Download the PDF manual.
Why the LSA needs head studs
The LSA leaves the factory supercharged — which means it already runs cylinder pressures near the limit of what its torque-to-yield head bolts can clamp. Factory bolts are torqued to a specified value plus a final 90° rotation that stretches them to their maximum point; add a smaller pulley, more boost, or a tune, and the clamping force securing the gasket, head, and block is no longer sufficient. The result: a blown head gasket.
Head studs are engineered to resist stretching. XOTIC PERFORMANCE™ head studs are manufactured from our premium XOTIC 7200 steel alloy, superior in tensile strength to any bolt, and backed by a lifetime warranty. The key to getting that strength into your engine is accurate preload — the tensile force generated when a fastener is tightened, creating clamp force in the joint. Everything in this guide is in service of achieving equal, accurate preload across all 30 studs.
What's in the CP889 kit
- 30 × head studs (XOTIC 7200 alloy) — 11mm and 8mm
- 30 × hardened parallel washers
- 30 × nuts
- 2 × sockets
- 2 × allen wrenches
- 1 × fastener assembly lubricant
Before you start: verify first
Confirm that part number CP889 is compatible with your application (2009–2017 6.2L LSA — CTS-V, Camaro ZL1, HSV GTS Gen-F, Vauxhall VXR8/GTS/GTS-R) before installing any components. Inspect all package contents and clean as necessary to ensure accurate installation. Report any obvious defects or shipping damage to us before proceeding.
How to install head studs on an LSA 6.2L
- Clean the block threads. Clean the threads in the block prior to installing the studs to ensure proper fitment and accurate torque readings. Dedicated thread chasers make this fast and protect the threads: M11 x 2.00 (CS324) for the primary stud holes and M8 x 1.25 (CS317) for the 8mm holes.
- Install the studs hand-tight — by size and location. Thread the head studs into the block by hand until snug; do not apply torque. Install the 11mm studs in locations 1–10 and the 8mm studs in locations 11–15, as shown in the manual's diagram.
- Check stud height with a straightedge. Use a straightedge ruler to measure the distance from the mating surface (deck or main cap) to the top of each installed stud. Ensure all studs of the same length group sit level with each other (within 1 mm / 0.040”). Uneven height may indicate debris or incorrect thread engagement. Properly installed studs will bottom out smoothly and show uniform height across all positions. If a stud appears higher or lower than the others, remove it, re-clean the hole, and reinstall by hand. Do not use tools to force studs deeper. Incorrect stud seating can cause off-angle stress, uneven preload, or stud fracture during engine operation.
- Set the gasket and head. Install the head gasket and cylinder head, ensuring proper alignment.
- Clean the washer seating areas. Clean the washer seating surfaces on the cylinder head with a fast-evaporating solvent such as non-chlorinated brake cleaner to remove oil, grease, and contaminants. A clean surface is essential for achieving proper fastener preload.
- Lubricate. Using the supplied fastener assembly lubricant, lubricate the stud threads and the bottom surface of the nuts.
- Install the nuts. Thread the nuts onto the studs and hand-tighten until they make contact with the washers.
- Torque in sequence. Follow the torque stages below in the numbered sequence shown in the manual's diagram.
LSA head stud torque specs
11mm studs (nuts 1–10, three stages)
| Stage | Torque |
|---|---|
| 1 | 30 ft-lbs |
| 2 | 60 ft-lbs |
| 3 (final) | 90 ft-lbs |
8mm studs (nuts 11–15)
Torque nuts 11 through 15 to 30 ft-lbs.
A common mistake to avoid: when torquing a fastener, do not stop short of the recommended value — continue in one motion until the specified torque is achieved. If you accidentally stop short, loosen the fastener and re-torque. Stopping short and "topping up" produces unequal preload distribution across the studs and risks joint failure.
Frequently asked questions
What are the torque specs for LSA head studs?
11mm studs (nuts 1–10): three stages — 30 ft-lbs, then 60 ft-lbs, then a final pass at 90 ft-lbs, in the numbered sequence. 8mm studs (nuts 11–15): 30 ft-lbs.
Which vehicles does the CP889 kit fit?
2009–2017 vehicles with the supercharged 6.2L LSA: Cadillac CTS-V, Chevrolet Camaro ZL1, HSV GTS Gen-F, and Vauxhall VXR8, GTS, and GTS-R. Check the manual for detailed fitment.
Which positions get which studs?
11mm studs in locations 1–10; 8mm studs in locations 11–15 — per the manual's diagram.
What about other LS engines?
Naturally aspirated production engines use the CP883 kit (2004+) or CP887 kit (1999–2003); LSX race blocks use the CP888 kit.
Need help?
For technical support, email support@xotic-performance.com. All XOTIC PERFORMANCE™ fasteners are covered by our limited lifetime warranty. Finished your install? Tag #XOTICPERFORMANCE on Instagram for a chance to be featured.
© 2026 XOTIC PERFORMANCE™. This installation guide is an original copyrighted work of XOTIC PERFORMANCE™. Reproduction, distribution, or use of this content in whole or in part without written permission is prohibited. Doc ref: 2025.10.19 (web edition 2026.08).
PACKAGE CONTENTS
VEHICLE FITMENTS
⚠️ PROP 65 WARNING
CALIFORNIA WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov
