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Performance Tuning & Diagnostics
Dyno-backed tuning and real diagnostics — clean, repeatable power.
- ECU & engine tuning
- Computer scan & diagnostics
- Drivability & misfire testing
- Plain-English read-out
Performance & Custom Shop · Miami, FL
Built for the way you actually drive.
RJM Performance is a Miami shop for tuning, engine and drivetrain, suspension, exhaust and custom paint — the whole build, handled under one roof in Allapattah.
RJM Performance LLC · A Florida shop since 2023 · All makes welcome
Established Florida shop, 2023
The shop 8,800 sq ft · paint booth
Where Allapattah, Miami
We build Domestic · import · performance
What we build
01 What we do
Everything the build needs, under one roof.
RJM Performance is a working shop — not a parts counter. From a first bolt-on to a full project car, here is what we handle in-house.
02
Engine & Drivetrain
Builds, forced induction, clutches and swaps — the heart of a fast car.
- Engine builds & rebuilds
- Turbo & supercharger work
- Clutch & transmission service
- Engine & drivetrain swaps
03
Suspension & Handling
Coilovers, bushings and alignment so the car turns the way it should.
- Coilovers & lowering setups
- Sway bars & bushings
- Corner-balance & alignment
- Ride-height & handling tuning
04
Exhaust & Intake
Custom exhaust fabrication, headers and intakes — tuned for flow and sound.
- Custom exhaust fabrication
- Headers & downpipes
- Cold-air & performance intakes
- Sound & fitment dialed in
05
Custom Paint & Body
Body kits, aero and full custom paint, finished in our in-house booth.
- Custom & full-colour paint
- Body kits & aero install
- Prep, blocking & finish work
- In-house 18-ft paint booth
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Brakes, Wheels & Detailing
Big-brake upgrades, wheel-and-tire packages and a proper finish.
- Big-brake upgrades
- Wheel & tire packages
- Fitment & clearance checks
- Finish detailing
02 How it works
From “what do you want it to do” to keys back.
- 01
Tell us the build
Call the shop or send the build form. Tell us the car, what you want out of it, and the budget you are working with.
- 02
Plan & quote
We look the car over, talk through what it needs to hit the goal, and quote it clearly — before a single bolt is turned.
- 03
Built & dialed in
We do the work, test it properly, and hand back a car that is faster, tighter and finished the right way.
03 Why RJM
A shop that does the work, start to finish.
RJM Performance is an independent shop in Allapattah — 8,800 square feet with an in-house 18-foot paint booth. Tuning, fabrication, mechanical work and paint all happen in the same building, by the same crew.
01
A real shop, not a parts counter
RJM Performance works on cars. We diagnose, build and finish them in-house — you deal with the people turning the wrenches, not a catalog.
02
One shop, the whole build
Tune, engine, suspension, exhaust and paint under one roof. No shuttling your car between three vendors to get one project finished.
03
The price before the wrench
You hear the plan and the number before any work starts — and what it buys you. No surprise invoice waiting at pickup.
04
Built to be driven
Street car, weekend car or a full project — we build it to hold up to real Miami driving, not just one clean dyno pull.
04 What we build
A look at the work.
Reference imagery for this preview — real shop photos go here before launch.
05 From the shop floor
What a finished build feels like.
Brought my car in for a stage-one setup. They walked me through the whole plan, quoted it upfront, and it drives exactly how they said it would.
Did a full custom exhaust and a tune. No rattles, it sounds mean, and the car finally pulls clean through the whole rev range.
The custom paint came out cleaner than I expected — colour-matched perfectly, and they took the time to do the prep right.
These are sample reviews for this preview. Once the site is live, this section shows RJM Performance’s real Google reviews.
06 Visit & start your build
Bring the car by Allapattah.
RJM Performance is on NW 52nd Street in Allapattah. Call the shop, or send the build form and we will get back to you to talk through the car.
Find the shop
Address3580 NW 52nd St, Miami, FL 33142
Phone(305) 502-7986ServingAllapattah · Miami-Dade
Hours
- Monday – Friday8:00 AM – 6:00 PM
- Saturday9:00 AM – 2:00 PM
- SundayClosed
Sample hours — the shop confirms its real hours before the site goes live.
Start your build
Tell us about the car and what you want out of it. We will call or text you back to talk it through — usually the same day.
Got it — thanks.
Thanks — RJM Performance will reach out to talk through your build.
Start your build
Got a car and a plan? Let’s build it.
Send the build form or call the shop. You will get a straight answer and an upfront quote — no parts-counter runaround.