Precision Harness

Precision Harness CAB TO ENGINE ECM WIRING for OEM/custom built engine swaps on class8 trucks only
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Peterbilt CABOVER getting a 70pin cat! Plus a TPs sensor and coolant level sensor. This will be a cool ride when finishe...
10/14/2026

Peterbilt CABOVER getting a 70pin cat! Plus a TPs sensor and coolant level sensor. This will be a cool ride when finished

Custom harness for a Western star going from a 70pin CAT to a Detroit ddec5. Harness, TPS sensor, battery box harness an...
10/13/2026

Custom harness for a Western star going from a 70pin CAT to a Detroit ddec5. Harness, TPS sensor, battery box harness and coolant level sensor.

FREIGHTLINER classic going from a Detroit ddec3/4 to a 40pin CAT
10/08/2026

FREIGHTLINER classic going from a Detroit ddec3/4 to a 40pin CAT

Harness to install a 70pin cat into 2006-2007 Peterbilt 379s that originally came with a Cummins ISXCM870
10/05/2026

Harness to install a 70pin cat into 2006-2007 Peterbilt 379s that originally came with a Cummins ISXCM870

Cummins ISX CM2350 standalone harness to install a 2014-current ISX engine into mechanical trucks getting updated to ele...
09/23/2026

Cummins ISX CM2350 standalone harness to install a 2014-current ISX engine into mechanical trucks getting updated to electronic engine controls.

🚨 NEW PRODUCT🚨The time has come. After hundreds of requests to start building the engine sensor harnesses, we listened! ...
09/09/2026

🚨 NEW PRODUCT🚨
The time has come. After hundreds of requests to start building the engine sensor harnesses, we listened! Introducing a Motorsport grade sealed C15 120pin injector engine harness. These are specific for certain engine builds. As time goes on we will have them for stock engine set ups

Note:
These are not cheap
They are not fast to build (4 In stock)
They are not for everyone
ONLY FOR CATS

Custom harness to install a 70pin CAT 6NZ in place of a Cummins CM570 for 1999-2003 Peterbilt 379s
09/07/2026

Custom harness to install a 70pin CAT 6NZ in place of a Cummins CM570 for 1999-2003 Peterbilt 379s

‼️NEW PRODUCT‼️06-07 Kenworth’s going from 70pin to 40pin catsThis adapter is the usual 40/70 but incorporates the proce...
08/20/2026

‼️NEW PRODUCT‼️
06-07 Kenworth’s going from 70pin to 40pin cats
This adapter is the usual 40/70 but incorporates the processor for the gauges to work, fan override and service brake functions

OEM replacement harness for a 1996 Freightliner FLD120 with a 40pin CAT. This one is discontinued from FL but we can sti...
08/17/2026

OEM replacement harness for a 1996 Freightliner FLD120 with a 40pin CAT. This one is discontinued from FL but we can still make it!

It was a freightliner week, 5 harnesses all for Freightliner classics and FLD’s. Pictured are 2 of them that we did. On...
07/24/2026

It was a freightliner week, 5 harnesses all for Freightliner classics and FLD’s. Pictured are 2 of them that we did. One was for an FLD going from a celect plus to a Detroit ddec4. The other is an FLD going from a celect plus to a 3406E 40pin CAT.

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Rindge, NH
03461

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