P1-Underground Tuning
Share
P1 Underground Tuning is a full service location that completes installs on all cars and trucks including engine swaps, go fast parts, long tube headers, etc.
We are located at 808 Jonesboro Rd West Monroe, LA 71292
Come on out and see us!
Ok, let me preface this by saying we are in Louisiana. The DA for this run was over 3100. The temp was still 81 degrees.
The car is definitely consistent and I can't wait to wake it up on a full fuel system.
127mph in the 1/4
11.2 in the quarter. So close to my goal of 10's.
Now, let's talk about this race. I don't know who owns the red truck, but holy crap, whoever has that thing is a genius. That truck is crazy. He started strong and even put 3 busses on me. I didn't think I would catch up.
If you could have been in my car with me, I was pumped. Lol
09/26/2026
Marc is on to the next round. Barely.
Monicccccccaaaaaaaà
The 500 lit the 650 up!
09/25/2026
Either I'm yelling for Monicaaaaaàaaaaaa or I'm screaming, Lets go, Rome!!!!!!
Ok, rule of thumb for Bobby and Marc. We dont talk crap about other tuners. A win is a win and a loss is a loss. If we win a race, we dont gloat. If we lose a race, we congratulate the other person and usually the other tuner.
Everyone has different ways of tuning. As long as the customer is happy, we are happy.
Now, lets talk some crap. Some in house crap talking. Marc and Shain battle tomorrow night at at Twin City Raceway.
Marc's car is an S650 with a g2 kit, catless LTH and a 115 pulley. Shain has a 21 GT500. Both cars are tuned by Marc.
Marc seems to think his car is going to walk away from Shain. Little does Marc know, Shain's car is set up to decimate the 650.
If you want to see some good racing, come on out!
09/23/2026
Who is your money on?
Shain in his 21 GT500 or Marc in his 25 Mustang GT with an ESS!
Both cars will be on 93. No E between them. Shain's car will usually light up the track. Marc, this will be his first pass down the track with an ESS.
Both are tuned by Marc.
Friday morning, we are going to do some dyno testing on our shop 650. Mods on the car are 2M catless long tube headers, fic1000 injectors, vmp bap, h pipe, ess g2 kit with a 115mm pulley.
On 93 we are hoping for 715hp in the Louisiana heat and air. On an e30 to e40 blend, 760.
We are going to do the pulls in 6th gear. Friday night, we will have it at the track for track times and head to head against our GT500.
This should be fun.
09/21/2026
This weekend we have a tad bit of boost weather coming our way. Ive got a great way to test it! Meet Shain and Marc at Twin City Raceway as they do battle against each other.
Marc's S650 with an ESS vs
Shain's GT500.
Marc has been talking all kinds of crap. Time to see what that car can do.
For Ponies In The Smokies, we would like to get a Tail of the Dragon run with Wicked Performance, TN, Wengerd Performance, P1 Tuners and our guys all together.
We will have more details as we get closer to the event but we feel like this could be a pretty fun ride.
Click here to claim your Sponsored Listing.
Category
Website
Address
808 Jonesboro Road
Monroe, LA
71292
Opening Hours
| Monday | 12pm - 8pm |
| Tuesday | 12pm - 8pm |
| Wednesday | 12pm - 8pm |
| Thursday | 12pm - 8pm |
| Friday | 12pm - 6pm |
| Saturday | 9am - 5pm |
Alerts
Be the first to know and let us send you an email when P1-Underground Tuning posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.