SLP MAP Sensor Extension Harness, GM LS Series 26" (ea.) Simple plug-in adapter harness for customers putting a new SLP ZL402 or SLP ZL427 into any LS1 based vehicle; extends the MAP Harness to reach the MAP Sensor located on the front of an LS2 or L76 intake manifold. RECOMMENDED PARTS PARTS THAT CAN ENHANCE THE APPLICATION OF PART# 23010 PART NUM DESCRIPTION PRICE 12507 Installation Kit, L92 Head-and-Manifold, 2nd Design Late LS2/LQ4/LQ9 Block $149.95 12400M24 Crate-Engine-Assembly, "ZL402" LS1 Iron Short Block (High Compression) 24 tooth $4,645.95 12401M24 Crate-Engine-Assembly, "ZL402" LS1 Iron Short Block (Low Compression) 24 tooth $4,645.95 12412M24 Crate-Engine-Assembly, "ZL402" LS2 Aluminum Short Block (High Compression) 24 tooth $4,995.95 12413M24 Crate-Engine-Assembly, "ZL402" LS2 Aluminum Short Block (Low Compression) 24 tooth $4,995.95 12400M58 Crate-Engine-Assembly, "ZL402" LS1 Iron Short Block (High Compression) 58 tooth $4,645.95 12401M58 Crate-Engine-Assembly, "ZL402" LS1 Iron Short Block (Low Compression) 58 tooth $4,645.95 12412M58 Crate-Engine-Assembly, "ZL402" LS2 Aluminum Short Block (High Compression) 58 tooth $4,995.95 12413M58 Crate-Engine-Assembly, "ZL402" LS2 Aluminum Short Block (Low Compression) 58 tooth $4,995.95