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OPGI Price: $32.99
Part Type: (R) = Authentic reproduction of the original GM product
Sold As: EACH
2017 Bonneville Catalog Page: 280
This stainless steel heat riser spring is an identical reproduction of the original equipment used on the exhaust flapper valve attached to your manifold. Designed to help raise engine temperatures, as the spring heats, the valve opens to allow full flow of the exhaust gasses. One per vehicle.