Manley titanium retainers(not included) are made of rugged and certified, heat treated aerospace grade titanium. They are a must for any high performance engine revving past the stock limits. The light weight mass allows the Nissan SR20DE/SR20DET to rev higher safely, but still keeps dangerous valve float in check. Manley has designed these with the highest quality standards and it shows in every aspect.
Note:Sold in sets of 16.
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