C5 LLC

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C5 LLC Performance Products We design and manufacture vehicle performance parts.

C5 Performance will be closed from this Friday October 16 until Monday October 26. We will be learning more about perfor...
10/14/2026

C5 Performance will be closed from this Friday October 16 until Monday October 26. We will be learning more about performance gains from Tibetan monks.

Sometimes investing in ourselves actually helps our customers 😊

What are primary and secondary ignition tables? This feature allows us to create two distinct timing maps and select the...
10/14/2026

What are primary and secondary ignition tables?

This feature allows us to create two distinct timing maps and select the one you want using a toggle switch.

It allows me to run a map I like but switch to a different map as a test. I don't need my laptop... I just flip back and forth to feel changes. This could also be used to train new drivers or even have a map for different situations.

Bottom line is this... for those of us who want to push efficiency regardless of engine size, this is THE ticket!! Get setup to measure a few things, and start learning what your engine wants.

Our Farmall governor kits allow the removal of the "twist" style factory part so you can run any carburetor. We switch t...
10/12/2026

Our Farmall governor kits allow the removal of the "twist" style factory part so you can run any carburetor. We switch to an adjustable rod and arm with LH/RH threaded heim joints. Easy to install, easy to fine tune.

We use a steel body with twin bronze oil impregnated supports for LONG life and butter smooth operation. No sloppy action!

We TIG weld the inner arm to a steel shaft. No roll pins to wear out. We use twin set screws on the outer arm.
The adjustable rod is Zinc coated. Everything else is painted.

THE BEST PART: These are reversible!!! Everyone knows how difficult finding 1940 something parts are. We designed this kit so you DO NOT drill, cut, grind, or otherwise butcher your stock parts.

We usually build these once a year for our carburetor customers but this time I'm building a few extra kits. My cell is 920.810.0946 if you are interested.

Ms Wigglebottom is celebrating her 7th birthday today! 🎂
10/11/2026

Ms Wigglebottom is celebrating her 7th birthday today! 🎂

This week gives us four days before taking a much needed vacation. I have two safety switches if anyone needs them. I'm ...
10/10/2026

This week gives us four days before taking a much needed vacation. I have two safety switches if anyone needs them. I'm also making a few Farmall governor kits (used to swap into a non-Farmall carb).

Header production is crankin' along, with a few ignition systems also being assembled. Man, time flies!

Friendly reminder... relays carry the load using 30 as input and 87 as output. The switch uses 86 as input and 85 as gro...
10/08/2026

Friendly reminder... relays carry the load using 30 as input and 87 as output. The switch uses 86 as input and 85 as ground UNLESS you are controlling the relay using your ECU.

If you are planning on managing coil, fuel pump, or other devices via our ignition please let me know. I will set up the software ahead of time!

Now is the time to plan Winter time upgrades! My cell 920.810.0946

In between header welding, Ms Wigglebottom and I drove 3 hours round trip to get my 60th birthday gift for myself 😆 Some...
10/07/2026

In between header welding, Ms Wigglebottom and I drove 3 hours round trip to get my 60th birthday gift for myself 😆

Sometimes to get an awesome gift, you order exactly what you want. Like headers, carbs, and ignitions hint hint 😉 😜

Building products that have little to no compromise requires more scratch built components. It has proven to be a solid ...
10/05/2026

Building products that have little to no compromise requires more scratch built components. It has proven to be a solid investment.

I enjoy designing parts and not having to ask my boss if we can build it a certain way!

Someone is getting a new performance item. I've got a growing list but enjoy helping people!
10/03/2026

Someone is getting a new performance item. I've got a growing list but enjoy helping people!

Shenanigans!
10/01/2026

Shenanigans!

Address

N1269 Shaky Lake Road
Fremont, WI
54940

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 4pm

Telephone

+19208100946

Website

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