We ship Mon - Fri. 12PM EST cutoff time for all orders. RETURNS NOT ACCEPTED for: wire, custom-length pigtails, harnesses, or extensions.

  • CORE ECU by HP Tuners

  • SHIPPING NOW!
  • NEW! TWO-PIECE TIMING COVER CONVERSIONS FOR SBC & LT1

  • Coming Soon! Prototypes have several hundred miles and counting...
  • PROM TUNING IS HISTORY

  • 58x/4x / Tuned Port Injection / Holley Terminator X Max ECU / Optional Drive by Wire / 4L60E / Paddle Shift
  • LT1 OPTISPARK ELIMINATED

  • 58x/4x / LT1 / Holley Dominator ECU / Optional Drive-by-Wire / T56 Transmission
  • BIG PERFORMANCE

  • 24x/1x / RAM JET 502 / Optional Mono Blade Drive-by-Wire Throttle Body
  • CRANK/CAM SIGNAL KITS FOR 4.3L V6

  • Including GMC Syclone and GMC Typhoon Engines

CORE ECU by HP Tuners

SHIPPING NOW!

NEW! TWO-PIECE TIMING COVER CONVERSIONS FOR SBC & LT1

Coming Soon! Prototypes have several hundred miles and counting...

PROM TUNING IS HISTORY

58x/4x / Tuned Port Injection / Holley Terminator X Max ECU / Optional Drive by Wire / 4L60E / Paddle Shift

LT1 OPTISPARK ELIMINATED

58x/4x / LT1 / Holley Dominator ECU / Optional Drive-by-Wire / T56 Transmission

BIG PERFORMANCE

24x/1x / RAM JET 502 / Optional Mono Blade Drive-by-Wire Throttle Body

CRANK/CAM SIGNAL KITS FOR 4.3L V6

Including GMC Syclone and GMC Typhoon Engines

SPECIALIZING IN CRANK & CAM SIGNAL CONVERSIONS FOR EARLY GM ENGINES

FEATURING QUALITY BRANDS YOU CAN TRUST

OUR CAPABILITIES & SERVICES WE OFFER

We welcome you to explore our manufacturing capabilities below and would like the opportunity to quote prototype and production work for you!

CAD & CAM PRECISION

Utilizing Autodesk Fusion 360, our home-grown products are the result of countless hours of planning, drawing, programming, prototyping and refinement. 

CAD DESIGN SERVICES: LET US CREATE YOUR 3D MODEL

Do you have a design or prototype product you would like modeled in an industry standard IGES or STEP file format? 2D PDF manufacturing drawings? Contact us for a quote.

CNC MANUFACTURING

Our crank/cam signal conversions are manufactured in-house using our two 3-axis CNC vertical machining centers.

CNC SERVICES: OUR 3 AXIS CAPABILITES

EFI Connection specializes in low volume production runs. If your local CNC production quotes are too high, we welcome the opportunity to offer a quote.

WIRE HARNESS PRODUCTION

Building quality engine wire harnesses for nearly 20 years.

HARNESS MANUFACTURING SERVICES

With our large inventory of OE connectors, production tooling, ultrasonic splice equipment, and years of experience, we are an excellent resource for your small to large wire harness manufacturing needs. Contact us for a quote.

ULTRASONIC WIRE SPLICES

Our engine wire harness production features state of the art, OE quality, splices that are ultrasonically welded and then protected with adhesive-lined shrink tube.

OE QUALITY WIRE SPLICES: AN AFFORDABLE SOLUTION

Save time and increase the quality of your harness work by letting us supply you with ultrasonic weld assemblies. We stock TXL wire in many OE color combinations from 22 AWG through 8 AWG. Send us a simple sketch or drawing of your splice assembly and we will provide a quote for the work.

PRODUCTION CRIMP TOOLS

Our engine harnesses are manufactured with production tooling that meets manufacturer-defined crimp height and width specifications.

CRIMPING SERVICES: MANUFACTURER SPECS

Stop using general repair tools that weren't designed to produce manufacturer-defined crimp heights and widths. Our tool selection includes semi-automatic presses/applicators and production hand crimp tools by Rennsteig. Contact us today to quote your terminal crimping needs.

LASER ENGRAVING

Our anodized aluminum parts are permanently marked with a bright white finish. 

CO2 LASER SERVICES: CUTTING AND MARKING

Our powerful Epilog 75 watt CO2 laser is capable of marking anodized aluminum and cutting softer materials like paper, cardboard, foam, acrylics, and even engine gasket material. With a generous table size of 40 x 28 inches, we welcome the opportunity to manufacture or mark your products.

3D PRINTED PROTOTYPES

Our ideas quickly come to life with our Markforged Mark Two printer.

3D PRINTING SERVICES: PROTOTYPING TO PRODUCTION