BTR Brian Tooley Racing LS Rear Engine Cover Gasket | Replaces GM 12639249 & 12633578 | Fits 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | OEM-Style Rear Cover (Rear Engine Cover Gasket Only)

The Brian Tooley Racing (BTR) LS Rear Engine Cover Gasket (BTR39249) is engineered as an OEM-style replacement for GM part numbers 12639249 and 12633578, providing reliable, leak-free sealing for the rear cover on LS engines. Designed for popular LS platforms ranging from 4.8L to 6.2L, including LS1, LM7, LQ9, LS3, and others, this gasket maintains proper oil control and rear cover alignment during engine operation. Manufactured from high-quality materials for excellent heat and oil resistance, it is ideal for refreshes, rebuilds, or routine gasket replacement. Whether servicing a daily-driven engine or maintaining an LS swap, this gasket ensures consistent rear cover sealing backed by BTR quality.

• OEM-Style Replacement: Replaces GM 12639249 and 12633578 with a precise sealing profile engineered for LS1, LS3, LM7, LQ4, LQ9, and other LS engine families to restore factory-fit rear cover sealing.
• Durable Sealing Material: Constructed from high-quality gasket materials designed to resist oil saturation, heat cycling, and long-term wear for dependable leak prevention around the rear engine cover.
• Consistent Rear Cover Alignment: Helps maintain proper rear cover positioning and crankshaft sealing surfaces, supporting stable operation during rebuilds, gasket service, or LS swap preparation.
• Ideal for Maintenance & Rebuilds: Suitable for engine refreshes, rear cover reseals, or complete LS rebuilds requiring an accurate, reliable gasket replacement without modification.
• Trusted BTR Manufacturing: Produced to meet strict dimensional and material standards, ensuring dependable sealing performance recognized throughout the LS service and performance community.