BTR Repair Insert - For Rocker Bolt Hole - M8-1.25 X M12-1.75 - Sold Individually - BTR4508-1. Sold as described below; installation labor and tuning are not included.
Repairs to M8-1.25 Must tap to M12-1.75 Tap Drill Spec: 10.4mm Use Tap: M12-1.75
Stripped threads in a cylinder head can bring an engine build to a screeching halt. Save your investment with the BTR Rocker Bolt Hole Repair Insert. Specifically engineered by Brian Tooley Racing, this heavy-duty insert provides a reliable, permanent fix for damaged rocker arm bolt threads. Instead of replacing an entire cylinder head, this insert reinforces the compromised area and restores factory-spec structural integrity.
Specifications:
- Manufacturer part number: BTR4508-1
- Brand: Brian Tooley Racing
- Part Type: Rocker Bolt Hole Repair
Match this part to your exact engine, cylinder heads, and intended use. Verify required clearances, spring setup, and measured pushrod length before installation. Cam stages are specific to their cam family.
Shipping: Lower-48 ground shipping is $19.99 per order. Use CAMSHIP199 for free cam-parts ground shipping on orders of $199 or more. Free shop pickup is available after your order is confirmed ready.
BTR Repair Insert - For Rocker Bolt Hole - M8-1.25 X M12-1.75 - Sold Individually - BTR4508-1. Sold as described below; installation labor and tuning are not included.
Repairs to M8-1.25 Must tap to M12-1.75 Tap Drill Spec: 10.4mm Use Tap: M12-1.75
Stripped threads in a cylinder head can bring an engine build to a screeching halt. Save your investment with the BTR Rocker Bolt Hole Repair Insert. Specifically engineered by Brian Tooley Racing, this heavy-duty insert provides a reliable, permanent fix for damaged rocker arm bolt threads. Instead of replacing an entire cylinder head, this insert reinforces the compromised area and restores factory-spec structural integrity.
Specifications:
- Manufacturer part number: BTR4508-1
- Brand: Brian Tooley Racing
- Part Type: Rocker Bolt Hole Repair
Match this part to your exact engine, cylinder heads, and intended use. Verify required clearances, spring setup, and measured pushrod length before installation. Cam stages are specific to their cam family.
Shipping: Lower-48 ground shipping is $19.99 per order. Use CAMSHIP199 for free cam-parts ground shipping on orders of $199 or more. Free shop pickup is available after your order is confirmed ready.
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