To ensure reliability, purchase GM part # 25517605 VALVE SPRING & DAMPER ASM. It is sometimes referred to as Pontiac Rocker Shaft Spring Kit. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Pontiac Firebird models.
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