Tweak'd Performance is located in
Summerville, SC. We build brand new, fully customizable engine wiring harnesses for popular engine swaps. We
intend to supply you with a top-quality
product in a timely manner
while providing outstanding customer service.
We've been so busy building wiring harnesses for
you that we haven't made a website update! Here at Tweak'd Performance we've improved
and streamlined our production process to offer unmatched
customizability for your wiring harness needs. Are you running
a stock ECU? AEM? ECUMaster? Haltech? ProEFI? Infinity? GM
coils? ID2000, ID1000, Bosch, Denso injectors, flex fuel, no
problem. We carry in stock every connector for every single
EMS, injector, and coil option so when you order a harness from
us we can have it put together and sent your way as quickly as
the next day for extremely urgent jobs! Equally important as
speed and customizability is the fact that all of
our harnesses are made here in the USA, while many companies
send their production to be done in totalitarian
countries with unethical labor practices. Think about where you're sending your money, check
the reviews and feedback on the forums, and then give us a
Tweak'd Performance – Fully customizable
wiring harnesses for GM LS1, LS2, Toyota 1JZ, 2JZ, 1UZ engines,
every variation of VVTi and non-VVTi, dual ECU, CAN BUS
solutions, and new products are on the way!
Have a harness idea that you want Tweak'd to
build? Give us a call, wholesale pricing is available.
March 2013: NEW from Tweak'd Performance: Plug and play wiring harnesses for ProEFI and Haltech Engine Management Systems!
you running an aftermarket EMS with your new engine swap, such as a
Sport 2000 from Haltech or Pro128 from ProEFI? No problem! Forget about
dangling connectors from unneeded sensors or cutting and splicing
different injector plugs into your harness. No need for one of those
bulky patch harnesses either! Get a BRAND NEW harness from Tweak'd
Performance that's slim, tidy, tucked away, and doesn't have any
unnecessary connectors or wire, and goes STRAIGHT to your new EMS. We
have all new ECU connectors and terminals in stock so just let us know
which EMS you're using for your project and we'll get you taken care
of! Give us a call today at 1-800-533-6775 or email us at email@example.com!
March 2013: Expanded Line for Plug and Play Conversions:
2JZ and 1JZ swaps into BMW, Nissan 300ZX, 350Z, Hyundai Genesis, and Scion FR-S!!!
years Tweak'd Performance has offered Self-Contained 2JZ and 1JZ engine
harnesses for more unique cross-platform engine swaps, but this year
we're taking it to another level by offering 100% PLUG & PLAY
harnesses for some non-Toyota vehicles, including BMW cars, the Nissan
300zx and 350Z, the Hyundai Genesis, and the all-new Scion FR-S! For a quote on a plug and play solution to yourengine swap, send us an email or give us a call at 1-800-533-6775!
March 2013: New Product From Tweak'd Performance:
LS1 Wiring Conversions for Supra, SC300, etc!
the past few years, the LS1 engine swap has started becoming more and
more popular, and we've gotten enough calls and requests for this
wiring conversion that we've decided to add it to our standard
services. Plug and play wiring conversions are now available for all LS
engines into any Toyota chassis!
Feb 2013: Did you see us in the latest issue of Super Street Magazine?
you to our customer Ranz Performance and Super Street Magazine for
mentioning our work in the March 2013 issue. Check it out!
Jan 2013: Project
Jumpstart begins! Special discounts on all wiring harnesses,
conversions, and parts from now until Feburary 8th! Contact us today to
take advantage of this special deal before we change to 2013 pricing!
Jan 2013: New Product from Tweak'd Performance: 2JZ-GTE VVTi
Engine Harnesses! Also available with braided sleeving and MIL-SPEC
Dec 2012: Here at Tweak'd Performance we're happy to release our new
wiring harnesses. Eliminate your old rubber firewall grommet with these
extreme-duty MIL-SPEC bulkhead connectors for the ultimate clean look
and the very best harness protection available. Pictures shown
alongside our EXTREME DUTY heatshrink looming: