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521lb/in front spring rate
Bolts onto 8-bolt internally balanced crankshaft with a 10-inch bolt pattern
It can be configured for a variety of racer set ups by removing a cheek pads and 3 screws
this can result in parallax error
Dial-In Board Bracket
Detroit Speed Heater Delete - Firewall Fill Plate - Bolt-In - 18-Gauge - GM F-Body 1697-69 - GM X-Body 1698-74 H76403FM 521lb/in front spring rateDue to vehicle variation, mounting hole modification may be necessary. Product Description: Firewall Fill Plate Heater Delete Bolt In 18 Gauge Steel Natural GM F Body 1697 69 GM X Body 1698 74 Sold Individually Detroit Speed puts a significant amount of effort into developing long lasting, dependable products that are formulated to exceed late model performance expectations. Our systems are designed by exceptionally qualified engineers and built by