Search Results for “LT1 Harness” – Howell EFI Conversion & Wiring Harness Experts

#HY47T – LT1 HARNESS: 1994-97 Corvette w/ Electronic Transmission 4L60E

#HY57T - LT1 HARNESS: 1994-97 Corvette w/ Electronic Transmission 4L60E

Part # HY47T

Engine and transmission wiring harness for 1994-1997 LT1 Corvette engine layout using 4L60E electronically controlled transmission.

#HF47 – LT1 HARNESS: 1994-97 Camaro/Firebird/Caprice/Roadmaster w/manual transmission

Part # HF47

Engine wiring harness for 1994-1997 LT1 Camaro/Firebird/Caprice/Roadmaster engines with manual or non-electronic automatic transmissions.

#HY47 – LT1 HARNESS: 1994-97 Corvette w/manual transmission

Part # HY47

Engine wiring harness for 1994-1997 LT1 Corvette engine layout when using a manual or non-electronic automatic transmission.

#HF47T – LT1 HARNESS: 1994-97 Camaro/Firebird/Caprice/Roadmaster w/ Electronic Transmission 4L60E

Part # HF47T

Engine and transmission wiring harness for 1994-1997 LT1 Camaro/Firebird/Caprice/Roadmaster engine layouts using 4L60E electronic transmissions.

#H233 – LT1 HARNESS: 1992-93 Corvette / 1993 Camaro

Part # H233

Designed in street rod configuration for the LT-1 engines. 36″ length from engine to ECM connectors. All relays and power leads located near ECM. This design uses the underhood, weatherproofed ECM, which can be mounted underhood or inside the vehicle as you prefer. It requires a special Mem-cal with vehicle anti-theft system (VATS) and several other functions deleted.

Posted on October 7, 2021November 12, 2021 by howellefi

Howell EFI Now Offers LT1/LT4 and EcoTec3 Harnesses for Classic Corvettes, Muscle Cars and Trucks

Marine City, MI… October 7, 2021 – Howell EFI, a leader in EFI conversion kits (GM/TPI/TBI) and wiring harnesses for direct injection swaps, now offers plug and play LT1/LT4 and EcoTec3 wiring harnesses for classic muscle cars, Corvettes and trucks. Howell now offers multiple options to transplant power for both automatic and manual transmissions and even supercharged classics.

The LT1/LT4, and EcoTec3 wiring harnesses are customized to the customer’s specifications and include fuse block, check engine light, GM diagnostic connector, and electric fan control in a complete street rod type, stand-alone design to control engine functions. There is only one ground for the entire system and only three points of power to hook up the harness – battery, ignition, and fuel pump. They are available with or without wiring for electronic transmission and all emission connectors are included to ensure this harness is street legal in all 50 states as a replacement harness. All Howell EFI harnesses are OE quality, American-made, and backed with a lifetime guarantee and Howell’s experienced technical support staff. GM ECM programming or custom GM ECM tuning are available specific to your engine and transmission combination.

“We see a lot of online conversion kits that claim to be a one size fit all solution for folks converting their cars to electronic fuel injection,” said Matt Howell, president of Howell EFI. “But the fact is that these are very complex systems that need special attention to the layout of the wiring harness and the right matching components. We spend a considerable amount of time during the order process to make certain every kit is what you need for true plug and play.”

Howell EFI harnesses are designed to transplant powerful engines into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sand Rails, Street Machines, and more.

GM LT1/LT4 Products 2014+

General Motors LT1/LT4 Products (2014+)

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GM EcoTec3 Products 2014+

GM ECOTec3 products

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For more information about Howell EFI LT1 wiring harnesses, view this video. For more information about Howell EFI, visit www.howellefi.com, or call (810) 765-5100. To review or download the LT-1 Fuel Injection Harness installation manual, visit here.

Posted on January 3, 2018August 4, 2020 by howellefi

LT1/LT4/Ecotec3 Gen V Swap Harnesses Now Available!

Howell EFI is pleased to introduce their new 2016 LT1 Camaro, 2014 – 2016 LT1 Corvette, and 2015 – 2016 LT4 Corvette harnesses, as well as its Ecotec3 truck versions for the 2014 – 2016 4.3L, 5.3L and 6.2L GM Gen V engines. For ease of installation, relays are included, wires are clearly labeled and terminated, and one ground serves the entire system. Harnesses also include 6L80/6L90 transmission functionality making the installation of these engines and transmissions as easy as possible.

Each new harness also features its own fuse block and a GM diagnostic connector. This allows customers to have their vehicles easily diagnosed and serviced at any repair facility utilizing the common OBD II port. Installation requires just three points of power at the battery, ignition, and fuel pump making these harnesses truly plug-and-play. Harnesses are prepared to customer specifications, not a one size fits all approach, and each incorporates a rugged nylon or OEM style plastic covering and glued shrink tube.

Howell EFI provides more vehicle coverage for these engines families at better prices than any other harness maker in the industry. With the ability to put an LT1, LT4, or Ecotec3 engine into basically anything you want, these new engines are sure to become very popular swap options. Each harness is proudly made in the USA with a Lifetime Guarantee.

Look to Howell EFI to make it happen with ease.

Application List

2014-2016 LT1 Corvette Harness Designs

#HY625846 – Manual Trans. – $900.00
#HY625846T – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

#HY625846E – $450.00 without ECM core trade-in
#HY625846EC – $275.00 with ECM core trade-in

2016 LT1 Camaro Harness Designs

#HF625846- Manual Trans. – $900.00
#HF625846T – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

#HF625846E – $450.00 without ECM core trade-in
#HF625846EC – $275.00 with ECM core trade-in

2015-2016 LT4 Corvette Harness Designs 6.2L Supercharged

#HY625846S – Manual Trans. – $900.00
#HY625846ST – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

#HY625846SE – $450.00 without ECM core trade-in
#HY625846SEC – $275.00 with ECM core trade-in

2014-2016 4.3L LV3-C-Truck Harness Design

#HVL435846 – Manual Trans. – $800.00
#HVL435846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

#HVL435846E – $450.00 without ECM core trade-in
#HVL435846EC – $275.00 with ECM core trade-in

2014-2016 5.3L L83-C-Truck Harness Design

#HVL535846 – Manual Trans. – $800.00
#HVL535846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

#HVL535846E – $450.00 without ECM core trade-in
#HVL535846EC – $275.00 with ECM core trade-in

2014-2016 6.2L L86 C-Truck Harness Designs

#HVL625846 – Manual Trans. – $800.00
#HVL625846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

#HVL625846E – $450.00 without ECM core trade-in
#HVL625846EC – $275.00 with ECM core trade-in

ADD $100.00 to harnesses requiring emission connections

ABOUT HOWELL EFI

At Howell EFI, we choose to sell only the best quality components and all are covered by a money back guarantee. For additional information visit www.howellefi.com or call 810-765-5100. Howell EFI is located at 6201 Industrial Way, Marine City, MI 48039

To learn more or to order your conversion kit or harness contact Howell EFI at www.howellefi.com or call (810) 765-5100.