SLP Throttle Body Wiring Adapter, LS1 to LS2 Drive by Wire (ea.) Simple plug-in adapter harness for customers putting a new SLP ZL402 or SLP ZL427 into a drive-by-wire LS1; enables the use of an LS2 throttle body on an LS1 harness. RECOMMENDED PARTS PARTS THAT CAN ENHANCE THE APPLICATION OF PART# 22020 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 ADD $4.95 HANDLING CHARGE PER ORDER