Review on π Enhanced Performance: COMP Cams 98012 Valve Spring Boosts Engine Power by Ryan Fitch
Works very well: Engines and engine parts
My Somoma 92 4.3L had worn springs and had to be removed to replace the valve seals. I would give them 5 stars but the engine vibrates a little more, although that's probably because they need to be broken in. Otherwise very happy with them.
Pros
- Part number: 980-12
Cons
- unreliable
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