Race Prep Performance
We are a full service performance & repair shop located in Phoenix, Az. We support all modern muscle and sports cars.
Oil changes, cam swaps, engine rebuild, suspension, tuning what ever you need done we have you covered.
06/11/2026
06/10/2026
Just some bad mother fu #%ing street cars... out here in gap city Arizona!!
06/09/2026
Can't wait to get some data on this trinity intake manifold for the 6.4 & 5.7 hemi cars. Paired with a demon 170 throttle body and our adapter. To top it off this will also get our high flow/high capacity catch can!! Stay tuned.
Why are the NA cars in Arizona running scared of a cam only 6.4 challenger... Let's line em up!!
Returning customer shipped his in for some modifications right after purchase. He hasn't even seen this truck in person yet! We did a front long travel kit from front coil overs from complete front end powder coating done by our good friends a custom front bumper made in house and of course he wanted to replicate the wild side exit exhaust we did on his by Its heading back to Tennessee to finally be with its owner!!
For the month of June let's do some deals $500 off our cam package with install. Message with year make and model for a quote.
392 srt challenger on the rollers. This car has our cam package, long tubes, and intake, and e85. Keeping power under wraps for now but we can get you setup the exact same way.
on the 💻
Jeep Wrangler 392 is in the shop. Before we started the tear down process we wanted to get a baseline. Bone stock 392 motor, with a blower, all that flowing through 40's.
Time to get it torn down and turn this thing up.
05/06/2026
What a terrible for the motorsports community... We lost a great one!!!
RIP Kyle
Mark brought his 2018 hellcat to us with lifter failure. It lost a roller on number 2 cylinder. Yes even "hellcat" lifter can fail. We installed our PD blower camshaft package as well as a lower dampener. The dampener was installed to combat the boost loss from a more efficient camshaft. We put down 738whp and and 656ftlbs on 11psi of boost (stock boost numbers) on 91 octane. We didn't want a risk a before dyno pull but typically stock cats make 620 to 640. Solid gain of 100-120whp. It will be back for e85 in the future!
- camshaft
- on the keyboard
what chop do you prefer? Hellcat widbody or 6.4 srt?
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Address
10111 N El Mirage Road Suite 8
El Mirage, AZ
85335
Opening Hours
| Monday | 8am - 6pm |
| Tuesday | 8am - 6pm |
| Wednesday | 8am - 6pm |
| Thursday | 8am - 6pm |
| Friday | 8am - 6pm |