P1-Underground Tuning

06/20/2026

Even our cars have to follow the guidelines.....

Public service announcement, anything related to the rear 02 sensor codes, we cannot turn those codes off.

It doesnt have an affect on any modes. So, this is just a cel.

We want to thank all of you for understanding.

06/18/2026

Unleash your ride’s potential with the 2M Fab Catless LTH + professional installation at P1 Underground. Precision-engineered for 2015+ Ford Mustang GT and select GT350 — expect improved exhaust flow and expert craftsmanship from our shop. Ready to feel the difference? Learn more and book your install: https://wix.to/lsDPVJX

$2299.99

06/18/2026

This is not a scam. This is legit. A DH engine for 7 grand.

If your 2024 GT has been eyeing what the Dark Horse is making, this is your answer. Or maybe you need a head start on that Coyote swap.

This Gen 4 Dark Horse long block is a direct drop-in replacement for the Dark Horse and a straight upgrade for the GT. Aluminum block, 12mm head bolts for higher clamp load, cross-bolted main caps, 12.0:1 compression, a forged steel crank, and a 9.5 quart oil pan.

Rated at 500 horsepower from the factory, and the architecture to handle a whole lot more. Coming in at $6,900, comparatively speaking, that's a great deal.

06/18/2026

After the 2M Fab Catless Long tubes installed. This ghost cam is rocking the car.

Keep in mind, the ghost cam is not set up for a 24 hour drive tune. This is just a fun show tune to turn heads.

06/16/2026

Someone is getting some Long Tubes installed today. Last week, we installed a set on a GT350. Today, an S650.

Both cars also received custom tune packages. Lets roll.

Special thanks to our mechanic crew of Hank, Dylan and Richard Henderson for all of their hard work.

06/15/2026

Fords at the Shore
September 5th thru 13th
Myrtle Beach, SC

Marc is calling out his teammates, Bobby from P1 Underground and Dan from P1 Tuners.

Lets catch a lane fellas. 2 650's, and a GT350.

We need a track in the Myrtle area! Who else wants to run?!?!??!?!

06/14/2026

1 Company
2 Mustang Tuners: Marc and Bobby
3 Different kinds of Mustangs in the stable
4 Total Mustangs in the stable
5 Platforms to tune on

You get the picture.














Bring it.

06/14/2026

Congratulations to the winner of the NA Street Class, Bobby Burch.

Harlee and Jordan Richard from Valor, wow! We cant wait to meet back up again. We want to thank all racers that came out for the Tuners Shoot Out.

We have a few cars left to run, but we want to thank everyone for coming out, getting some runs in, being 100% cordial and friendly, and understanding that this is our first event and we look forward to holding more events.

Twin City Raceway, thank you!
Valor, again, thank you!

06/14/2026

And.....in the finals, for the NA cars:

From Valor Motorworx, Harlee in a 10 Speed
VS
From P1 Underground, Bobby, in his GT350!

This is exciting!

Jordan Richard, nice job!
Bobby Burch, nice job!
Harlee, nice driving!