57-74 cars used the exhaust heat riser valve. The High Performance cars used the spacer without the butterfly.
2 inch ID
CORVETTE EXHAUST SPACERS VALVES RISERS
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58-74 cars used the exhaust heat riser valve.
2 inch ID
NOTE: When installing the heat riser, the butterfly weight goes toward the rear of the car.CORVETTE EXHAUST SPACERS VALVES RISERS…
57-74 cars used the exhaust heat riser valve. The High Performance cars used the spacer without the butterfly.
- 2 and 1/2 inch IDCORVETTE EXHAUST SPACERS VALVES RISERS…
58-74 cars used the exhaust heat riser valve.
2 and 1/2 inch ID
NOTE: When installing the heat riser, the butterfly weight goes toward the rear of the car.
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