Michigan Motorsports 7° Valve Locks Keepers for LS/LT Engines - 8mm Beehive & Dual Spring Compatible, Full 16-Valve Set

These Michigan Motorsports 7-degree valve locks are precision 8mm keepers engineered to secure beehive or dual valve spring retainers on LS and Gen V LT engines for reliable high-RPM performance.

If you are assembling or refreshing the top end of an LS-series or Gen V LT engine, valve locks are a small part that makes a big difference. Michigan Motorsports designed this full set of 7° keepers (Part #Ai141-32) to fit common retainers from PAC, BTR, TSP and OEM sources, giving a worry-free fit on 4.8L through 7.0L platforms. They’re intended for performance cam builds, head swaps, and complete valve-train rebuilds where secure, repeatable retention is required.

How do these 7° keepers fit my LS or LT engine?

These keepers are made for 8mm valve stems and a 7-degree retainer seat angle, a common spec in many aftermarket and OEM GM heads. They install like traditional split locks but are profiled to match 7° retainers, ensuring even load distribution and resistance to slippage under valve spring pressure.

• Fits 8mm valve stems used on LS1, LS2, LS3, LQ4, LQ9, L83, L86 and similar heads.
• Specifically cut for 7° retainer seats for accurate seating and clamping.
• Sold as a complete set for all 16 valves—ready for a full top-end job.

Will they work with beehive and dual valve springs?

Yes—these keepers are compatible with both beehive-style and dual-spring retainers. The geometry accommodates common retainer types from PAC, TSP, BTR and OEM designs, so you can use them across a range of valvetrain setups without swapping keeper styles.

• Beehive spring retainers: stable fit with reduced spring binding.
• Dual-spring retainers: secure outer and inner spring seats for high-load use.
• Compatible with popular aftermarket retainers from leading manufacturers.

Are these valve locks durable enough for high-RPM or race use?

They’re manufactured from high-strength materials intended to endure sustained valve-train loads and the repeated stresses of high engine speeds. Proper installation and matching to the correct retainer angle are essential to get the intended lifespan and resistance to wear or loosening.

• High-strength construction resists deformation under load.
• Precision machining reduces micro-movement and wear at the contact surfaces.
• When paired with correct retainers and valve stems, they maintain secure clamping at high RPMs.

What engines and applications are these keepers best for?

These keepers are suited to a wide range of GM small-block and modern LT platforms where 8mm valve stems and 7° retainers are used. They’re a direct fit for many street performance, crate-engine, and race builds that require a robust, serviceable retention solution.

• Compatible with LS1, LS2, LS3, LQ4, LQ9, L83, L86 and other LS/LT variants.
• Suitable for 4.8L, 5.3L, 5.7L, 6.0L, 6.2L and 7.0L applications.
• Ideal for cam swaps, head swaps, and full valve-train refreshes.

Who is this for? These Michigan Motorsports 7° valve locks are aimed at engine builders, professional shops, and experienced DIYers performing performance top-end work on GM LS and LT engines. If you need a dependable, correctly angled set of 8mm keepers that work with beehive or dual-spring retainers from PAC, BTR, TSP or OEM suppliers, this set provides a complete, ready-to-install solution for all 16 valves during a rebuild or upgrade.