Manley Spring Retainer, RET-H-13 1.335 10 DEG +.050 LS1

Manley Performance is a well-known name in the performance engine world, and they make some solid parts. If you're building a performance engine and need spring retainers that can handle the stress without breaking the bank, these H-13 tool steel retainers are a great option. They're designed as a more economical alternative to titanium retainers, which can be helpful if you're dealing with specific engine rules or just want to manage costs on a build.

What sets these apart is the H-13 tool steel itself. Manley uses it because it processes better than other tool steels, meaning they can make a stronger and more durable retainer. They're lightweight, which helps reduce valve train mass, and the specific sizing here is for a 1.335 inch retainer diameter, 10-degree lock angle, and they are +.050 inch over standard, designed for LS1 engines. This attention to detail means they fit right and perform reliably under demanding conditions.