{"title":"Extension Harnesses","description":"\u003cp\u003e\u003cspan\u003eA harness with one end crimped with the mating connector for the other. If looking for a\u003cspan\u003e harness that adapts one type of device or sensor to another, \u003c\/span\u003eplease see \u003ca title=\"Adapter Harnesses\" href=\"[productcategory_link,id=88]\"\u003eAdapter Harnesses\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"optispark-harness-vented-late-attaching-clip","title":"Optispark Harness - Vented - Late Attaching Clip","description":"\u003cp\u003eThis harness is used with 1995-1997 Camaro\/Firebird, 1995-1996 Corvette, and 1994-1996 B-Body. This harness assembly uses factory type high temp convoluted split loom and features the correct intake manifold attaching clip for 1994-1997 LT1 engines with the vented optispark distributor. For better heat protection, consider EFI#\u003ca title=\"Optispark Harness - Vented - Hi Temp\" href=\"[product_link,id=465]\"\u003e100-00468\u003c\/a\u003e for high temp fiberglass braid. We use the CORRECT harness connector that DOES NOT REQUIRE MODIFICATIONS to fit any LT1 engine harness connector.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114166059142,"sku":"100-00393","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00393.png?v=1770889243"},{"product_id":"tps-adjustment-harness","title":"TPS Adjustment Harness","description":"\u003cp\u003eThis harness is used to adjust TPI and many TBI throttle position sensors.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114166091910,"sku":"100-00394","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/tps_adjustment_harness.png?v=1770889249"},{"product_id":"optispark-harness-vented-hi-temp","title":"Optispark Harness - Vented - Hi Temp","description":"\u003cp\u003eThis harness is used with 1995-1997 Camaro\/Firebird, 1995-1996 Corvette, and 1994-1996 B-Body. This harness assembly uses high temp fiberglass braid to resist temperatures up to 1,200 degrees Fahrenheit.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114178379910,"sku":"100-00468","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/optispark_harness_vented_high_temp.jpg?v=1770889649"},{"product_id":"e40-j1-harness-assembly","title":"E40 J1 Harness Assembly","description":"\u003cp\u003eIf you are reworking a 2005-2006 GTO engine harness for an engine conversion, this is the body harness portion you are missing. Includes E40 ECM J1 BLUE connector assembly (includes all secondary locks), 2005-2006 GTO pedal connector (5 ft wire from ECM protected with black expandable sleeving), OBDII diagnostic connector (5 ft wire from ECM), and 3 ft of automotive TXL wire lengths (using GTO harness colors) for all possible functions as available in the GTO. It is likely that you will not have to use all of the wires, but they are all there should you need them. E40 ECM and GTO pedal assembly are not included. Wiring schematics are not included.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114178838662,"sku":"100-00471","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/E40_ECM_J1_Assembly.jpg?v=1770889666"},{"product_id":"optispark-harness-non-vented","title":"Optispark Harness - Non Vented","description":"\u003cp\u003eThis harness is used with 1993-1994 Camaro\/Firebird\/Corvette. This harness assembly uses factory type high temp convoluted split loom and features the correct intake manifold attaching clip for 1993-1994 LT1 engines. For better heat protection, consider part number 100-00488 for high temp fiberglass braid. We use the CORRECT harness connector that DOES NOT REQUIRE MODIFICATIONS to fit any LT1 engine harness connector.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114182508678,"sku":"100-00487","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/optispark_harness_nonvented_stock_replacement.jpg?v=1770889748"},{"product_id":"optispark-harness-non-vented-hi-temp","title":"Optispark Harness - Non Vented - Hi Temp","description":"\u003cp\u003eThis harness is used with 1993-1994 Camaro\/Firebird\/Corvette. This harness assembly uses high temp fiberglass braided sleeving and features the correct intake manifold attaching clip for 1993-1994 LT1 engines.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114182869126,"sku":"100-00488","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/optispark_harness_nonvented_high_temp.jpg?v=1770889754"},{"product_id":"optispark-harness-vented-early-attaching-clip","title":"Optispark Harness - Vented - Early Attaching Clip","description":"\u003cp\u003eThis harness is a perfect fit for 1993-1994 LT1 engines that have upgraded to the newer vented optispark distributor. Features the correct intake manifold attaching clip for 1993-1994 LT1 engines. For a high-temp fiberglass braiding please see EFI#\u003ca title=\"Optispark Harness - Vented - Hi Temp\" href=\"[product_link,id=465]\"\u003e100-00468\u003c\/a\u003e.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114183065734,"sku":"100-00489","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00489.png?v=1770889759"},{"product_id":"oxygen-sensor-extension-harness-15-inches","title":"Oxygen Sensor Extension Harness - 15 inches","description":"\u003cp\u003eThis oxygen sensor extension harness fits LT1 Camaro\/Firebird\/Corvette, and LS1\/LS6 Corvette. Built with the highest quality TXL insulated wire, Delphi connectors, production crimp tools, an attachment clip for frame\/fender\/bracket, a secondary connector lock attached to the harness, and finished with high temperature fiberglass braided sleeving. Please measure for your application before purchasing this 15 inch extension. We can assemble an extension longer or shorter to fit your needs.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114186735750,"sku":"100-00558","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/oxygen_sensor_extension_harness_ls1_corvette.jpg?v=1770890168"},{"product_id":"oxygen-sensor-extension-harness-15-inches-2","title":"Oxygen Sensor Extension Harness - 15 inches","description":"\u003cp\u003eThis oxygen sensor extension harness fits LS2 Corvette and LS6\/LS2 GTO. Built with the highest quality TXL insulated wire, Delphi connectors, production crimp tools, an attachment clip for frame\/fender\/bracket, a secondary connector lock attached to the harness, and finished with high temperature fiberglass braided sleeving. Please measure for your application before purchasing this 15 inch extension. We can assemble an extension longer or shorter to fit your needs.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114186768518,"sku":"100-00559","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/oxygen_sensor_extension_harness_gto.jpg?v=1770890172"},{"product_id":"map-sensor-adapter-extension-harness","title":"MAP Sensor Adapter Extension Harness","description":"\u003cp\u003eThis MAP sensor adapter harness will plug into an LS1\/LS6 type engine harness and be routed to plug into the MAP sensor at the front of an LS2 type intake manifold. Harness length is approximately 30 inches.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114186801286,"sku":"100-00560","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00560.png?v=1770890178"},{"product_id":"optispark-adapter-harness","title":"Optispark Adapter Harness","description":"\u003cp\u003eThis adapter harness is for use with a \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e1992 Corvette only\u003c\/strong\u003e\u003c\/span\u003e. If any 1993-1997 LT1 optispark harness is to be used with a 1992 Corvette, this adapter harness will make it plug and play.\u003c\/p\u003e\u003cp\u003eAlso for use with 1992 Corvette when installing an MSD optispark (because MSD does not provide the correct connector for the 1992 Corvette). Approximately 6 inches in total length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstructions in 3 steps:\u003c\/strong\u003e Remove the fuel rail cover. Disconnect the original 18 inch distributor harness. Install this adapter harness\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114295787654,"sku":"100-00621","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00621.png?v=1770890516"},{"product_id":"mat-jumper-harness-for-tpi","title":"MAT Jumper Harness for TPI","description":"\u003cp\u003eThis is the jumper harness that connects the 85-92 Camaro\/Firebird TPI harness to the Manifold Air Temperature sensor under the plenum. Approximately 12 inches in length. This harness also fits most 85-89 Corvette. Some Corvette applications (including 90-91) will require EFI#\u003ca title=\"MAT Jumper Harness for Corvette TPI\" href=\"[product_link,id=623]\"\u003e100-00627\u003c\/a\u003e because a different MAT sensor is used.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114333044870,"sku":"100-00626","price":16.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/TPI_MAT_harness_FBody.jpg?v=1770890545"},{"product_id":"mat-jumper-harness-for-corvette-tpi","title":"MAT Jumper Harness for Corvette TPI","description":"\u003cp\u003eThis is the jumper harness that connects the 90-91 Corvette TPI harness to the Manifold Air Temperature sensor under the plenum. Approximately 12 inches in length. May fit some 85-89 Corvette. For most 85-89 Corvette and all TPI Camaro\/Firebird, you must use EFI# \u003ca title=\"MAT Jumper Harness for TPI - for 85-92 F-Body and 85-89 Corvette\" href=\"[product_link,id=622]\"\u003e100-00626.\u003c\/a\u003e\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114333208710,"sku":"100-00627","price":16.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00627.png?v=1770890551"},{"product_id":"maf-extension-harness","title":"MAF Extension Harness","description":"\u003cp\u003eThis MAF extension is intended for LS3 type MAF sensors. This extension harness measures 15 inches. For custom lengths, please contact us before ordering. Also fits many other MAF sensors.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114402152582,"sku":"100-00640","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/MAF_extension_LS3.jpg?v=1770890630"},{"product_id":"intake-air-temp-extension-harness","title":"Intake Air Temp Extension Harness","description":"\u003cp\u003eThis intake air temperature sensor extension harness is intended to allow for relocation of an LT1 or LS type intake air temperature sensor. This harness measures approximately 21 inches in length.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114406969478,"sku":"100-00641","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00641.png?v=1770890636"},{"product_id":"efi-24x-crank-sensor-test-harness","title":"EFI 24x Crank Sensor Test Harness","description":"\u003cp\u003eWhen diagnosing a no spark or intermittent spark condition after an EFI 24x conversion, it is most useful to watch for a good 24 pulse waveform using an oscilloscope. This breakout harness connects between the 24x crank sensor and engine harness while breaking out the sensor signal wire (BLUE\/WHITE) and sensor low wire (YELLOW\/BLACK). The length of the breakout leads is approximately 5ft. This harness is not for use with an LS1 crank sensor or LS1 engine harness.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114412572806,"sku":"100-00642","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/EFI_24x_Crank_Sensor_Test_Harness.jpg?v=1770890642"},{"product_id":"tac-to-pedal-harness-3","title":"TAC to Pedal Harness","description":"\u003cp\u003eThis TAC module to pedal harness is for 2004 and older GM trucks. Standard length is 4ft (which is not necessarily the length as is found in a 2004 and older truck). For any length other than 4ft, please contact us for a quote; we can assemble a harness for your length requirements.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114413392006,"sku":"100-00643","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00643.png?v=1770890647"},{"product_id":"tac-to-pedal-harness","title":"TAC to Pedal Harness","description":"\u003cp\u003eThis TAC module to pedal harness is for all LS1 and LS6 Corvettes. Standard length is 4ft (which is not necessarily the length as is found in a Corvette). For any length other than 4ft, please contact us for a quote; we can assemble a harness for your length requirements.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114418339974,"sku":"100-00644","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/tac_to_pedal_LS1_Corvette.jpg?v=1770890652"},{"product_id":"tac-to-pedal-harness-2","title":"TAC to Pedal Harness","description":"\u003cp\u003eThis TAC module to pedal harness is for 2004-2005 CTS-V applications only. Standard length is 4ft (which is not necessarily the length as is found in the CTS-V). For any length other than 4ft, please contact us for a quote; we can assemble a harness for your length requirements.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43114425090182,"sku":"100-00645","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-00645.png?v=1770890660"},{"product_id":"oxygen-sensor-extension-harness-15-inches-3","title":"Oxygen Sensor Extension Harness - 15 inches","description":"\u003cp\u003eThis oxygen sensor extension harness fits LS1 Camaro\/Firebird and many other GM applications. Built with the highest quality TXL insulated wire, Delphi connectors, production crimp tools, an attachment clip for frame\/fender\/bracket, a secondary connector lock attached to the harness, and finished with high temperature fiberglass braided sleeving. Please measure for your application before purchasing this 15 inch extension. We can assemble an extension longer or shorter to fit your needs.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115488182406,"sku":"100-00819","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/HO2_extension_LS1_F-Body.png?v=1770891625"},{"product_id":"tpi-mat-extension-harness-42-inches","title":"TPI MAT Extension Harness - 42 inches","description":"\u003cp\u003eThis harness is to be used with GM TPI engine harnesses when extending the MAT sensor ahead of the throttle body. Requires an LT1 or LS1 type IAT sensor.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115488215174,"sku":"100-00820","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/MAT_extension_ahead_of_throttle.png?v=1770891630"},{"product_id":"tac-to-pedal-harness-4","title":"TAC to Pedal Harness","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eObsolete. Replaced by p\/n \u003ca href=\"tac-to-pedal-harness-3\"\u003e100-00643\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis TAC module to pedal harness is for 2005 GM trucks. There are six wires in this assembly (not represented by product image) to provide for two of the three sensors within the Accelerator Pedal Position (APP) sensor housing (as the 2003-up TAC modules only use two sensors).\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e Standard length is 4ft (which is not necessarily the length as is found in a 2005 truck). This harness was designed for aftermarket use when swapping an LS engine into a different vehicle. \u003cstrong\u003eThis harness does not include a firewall grommet.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115584651398,"sku":"100-00977","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/tac-to-pedal-2004-older-truck.jpg?v=1770896552"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/collections\/No-Image-Available-2_99fbfea5-69b9-467a-9cfb-224d8c589b59.png?v=1788276593","url":"https:\/\/www.eficonnection.com\/collections\/extension-harnesses.oembed","provider":"EFI Connection","version":"1.0","type":"link"}