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![R550-16 Titanium Dual 500 Series Ti-17 Valve Spring Retainers [Set of 16]](https://www.jegs.com/images/mini_750/200/278/278-r550-16.jpg)
Vehicle Info NeededPAC RACING SPRINGSPART NUMBER: 278-R550-16
R550-16 Titanium Dual 500 Series Ti-17 Valve Spring Retainers [Set of 16]
$51997
Ships on 11/13/2026
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Dual 500 Series
Titanium Dual 500 Series Ti-17 Valve Spring Retainers1.240 in. Outside Diameter .685 in. 2nd Step Diameter 8-Degree Lock Angle Fits PAC RPM Series Dual Valve Springs Ti-17 Titanium Set of 16
Pro grade ultra-high strength and lightweight 500 series retainers are optimized for thickness and strength using Ti-17 material. Stringent material certifications and ultimate strength testing ensure peak performance.
- Ti-17 titanium construction
- Ultra-high strength and light weight
- Stringent material certifications and ultimate strength testing ensure peak performance
Maintain High Strength with Lightweight Designs
PAC Valve Spring Retainers are a must have when upgrading your valvetrain. Valve springs with larger diameters and higher spring pressures will require new retainers.
Beehive 300 Series Valve Spring Retainers are designed for smaller beehive springs and made from heat treated 4140 chrome moly steel with black oxide finish. PAC-Tuff 400 Series Valve Spring Retainers are constructed from 6AL4V Titanium alloy and they are completely sonic tested to aerospace standards prior to CNC-machining. Robust PAC-Tuff retainers are designed for standard to high durability.Part TypeValve Spring Retainer
Product LinePAC Valve Spring Locks and Retainers
BrandPAC RACING SPRINGS
Package Height2.3
Package Width4.4
Package Length7.85
Weight0.61 PG
Part CategoryPerformance Parts
Retainer Style8 Degree
QuantitySet of 16
Part FitmentSemi Universal
Outside Diameter1.240 in.
Retainer MaterialTi-17 Titanium
Valve Spring StyleDual
Vendor Part NumberPAC-R550-16
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
