PSI (Performance Systems Integration)

PSI (Performance Systems Integration) Standalone wiring harnesses and Conversion Parts for GM LS LT engines
Made in USA! 🇺🇸
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We are an aftermarket engine harness and conversion parts manufacturer and retailer.

07/24/2026

There’s only one right answer and it doesn’t start with the letter F

07/20/2026

How long does it take the install a PSI wiring harness?

The PSI team had an incredible time Syracuse Nationals in New York this weekend! Got to see some old friends, cool peopl...
07/18/2026

The PSI team had an incredible time Syracuse Nationals in New York this weekend! Got to see some old friends, cool people, and some fire PSI builds as well! Stay tuned for the YouTube recap and thank you again to everyone stopped by the booth! Until the next one ☝️

Congratulations OFFICINA FC LTD SPECIALTY VEHICLES on your 67 c10’s top ten win Syracuse Nationals
07/18/2026

Congratulations OFFICINA FC LTD SPECIALTY VEHICLES on your 67 c10’s top ten win Syracuse Nationals

07/18/2026

Syracuse Nationals isn’t over yet! Check us out at Chevy Court to talk everything LS/LT and how PSI can get you wired up and fired up 👍

07/17/2026

If you’re at Syracuse Nationals and you haven’t stopped by the PSI booth yet, what are you doing???

07/16/2026

Want to keep that small block Chevy style but upgrade to modern EFI? The PSI Classic Engine Controller Kit makes it happen. 🔧🔥

Built for Gen IV 58x LS engines, this setup lets you run a classic-style intake while keeping factory GM drive-by-wire and fuel injection, giving you the best of both worlds.

💥 True stand-alone system
💥 Plug-and-play install
💥 Factory ECM + TCM included
💥 Base tune to get you up and running

No chasing parts. No guesswork. Just a clean, reliable setup for your build.

Pair it with our intake kits, throttle body adapters, and valve cover options to complete the look 👌

⚠️ Custom tune recommended for max performance, especially on modified setups.
Ready to build it your way?

Reach out today.
📞 732-276-8589 | 💻 [email protected]

07/16/2026

You heard it here folks. Syracuse Nationals is HERE and you need to head over to the PSI booth and check out the lineup of merch, customer builds, and products that we’ve got laid out! July 16-18, we’re here until Saturday.

07/12/2026

5 Reasons Why YOU Need a PSI Wiring Harness...

📞 732-276-8589 | 💻 [email protected]

07/11/2026

is a 71’ Chevy Nova with a Gen4 controller kit powering a supercharged LSA.

What PSI Build is your favorite? Comment down below 👇

Address

2029 Route 88
Brick Township, NJ
08724

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+17322768589

Website

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