Street/strip engine packages, chassis support, and tuning setups built to work as a complete package.
Stillwater, Oklahoma performance shop
Built for drag racing pressure and real-world reliability.
Engine rebuilds, EFI tuning, diesel truck repair, transmission repair, and diagnostics for racers, truck owners, and daily drivers in Stillwater, OK. No runaround, just honest work that holds up.
- Drag racing builds
- Engine builder
- EFI tuning
- Gas and diesel
Shop status
Available 24/7
Tony stays involved through diagnosis, options, updates, and final handoff.
Camaros, diesel trucks, tractors, BMWs, swaps, and repair work that other shops turn away.
Honest work, practical recommendations, and pricing that does not punish you for not knowing what is wrong.
24/7
Call or text access
EFI
Specialist tuning support
Gas + Diesel
Full-spectrum engine work
Stillwater, OK
Serving local racers and drivers
Featured work
Street / Strip Build
Street / strip engine combinations
Stronger combinations built for the street and the track, with the reliability to back it up.
Read case study
EFI & Tuning
EFI setup and drivability cleanup
For combinations that need smarter fueling, cleaner power delivery, and a setup that actually works together.
Read case study
Diesel & Truck Work
Diesel and work-truck repair
Diagnosis, repair, and powertrain work for trucks that still need to tow, pull, work, and stay dependable.
Read case studyProject Spotlights
Real examples that back up the service pages.
01
2011 Camaro EFI Tuning Revision
Drivability cleanup and tune refinement for a performance car that needed the calibration to match the build.
Open case study 02EcoDiesel Rebuild Options
Diesel rebuild planning centered on honest options, customer updates, and a smarter path forward.
Open case study 03Street / Strip Engine Package
Combination-first engine planning for customers who want stronger performance without a headache everywhere else.
Open case study 04BMW Transmission Rebuild
Diagnosis and rebuild planning that got the car back to dependable service and earned repeat-work trust.
Open case studyAbout the shop
Small shop attention with serious performance knowledge.
This is not a drop-your-keys-and-hope-for-the-best shop. Foulks Performance is built around direct communication, hands-on work, and engines that have to prove themselves under load.
Whether you are piecing together a drag car, bringing a diesel back to life, or making a daily driver dependable again, the approach does not change: find the real problem, build it right, and keep you in the loop.
- Clear owner communication instead of front-desk guesswork
- Options and pricing discussed before the work moves forward
- Real range across gas, diesel, street, strip, and swap jobs
Services
From full race builds to daily-driver rescue work.
01
Engine builds & rebuilds
Custom combinations, stock replacements, refreshes, and stronger engine rebuild services for street, strip, and work vehicles. Covers LS swaps, Coyote builds, small block and big block platforms in Stillwater, Oklahoma.
Learn more 02Drag racing support
Performance-first planning, powertrain prep, and setup guidance for builds that need to leave hard and finish strong. Full combination understanding for quarter-mile and eighth-mile racing in Oklahoma.
Learn more 03EFI tuning
Electronic fuel injection setup and EFI tuning Stillwater OK drivers use for stronger drivability, cleaner power delivery, and fuel maps that actually match the build.
Learn more 04Dyno tuning
Dyno-based tuning for stable drivability, repeatable power delivery, and safer calibration decisions on street and race combinations.
Learn more 05Transmission service
Transmission rebuilds, replacements, and transmission repair Stillwater OK customers use when the transmission is the weak link in the package.
Learn more 06Diesel truck repair
Diesel diagnosis and diesel truck repair Stillwater OK owners rely on for Duramax, Powerstroke, and Cummins trucks that need to tow, pull, commute, or get back to dependable service.
Learn more 07Wiring, swaps & electrical
Harness cleanup, swap integration, and electrical troubleshooting without hack-job shortcuts. LS swap wiring, engine swap harness work, and auto electrical repair from an LS swap shop Stillwater OK drivers can actually trust.
Learn more 08Performance diagnostics
Root-cause diagnostics for misfires, fueling issues, boost leaks, sensor faults, and electrical problems before money gets burned on unnecessary parts.
Learn moreHow it works
Know what to expect before you ever pick up the phone.
Tell the shop what you have
Share the vehicle, symptoms, current setup, and what you are trying to fix or build.
Get options and expectations
Discuss likely paths, parts or repair direction, and what makes sense for your budget and goals.
Approve the work
Once the direction is clear, the job moves forward with fewer surprises and better communication.
Stay updated through the build
You will get updates throughout the build instead of wondering what is happening to your vehicle.
Reviews
The work speaks for itself, but our customers speak up, too.
“Tony knows his stuff, goes out of his way above and beyond to make your stuff right.”
Mike B.“Outstanding job on my 2011 SS Camaro. Any time I wanted a change, they hooked me up without an issue.”
Colton S.“Excellent service. Met labor deadlines. Was able to get a salvage transmission at a reasonable rate. Good communication.”
Lura J.D.“They never gave up on my Enclave. I appreciate all the hard work and highly recommend Foulks Performance.”
Amy D.“Tony rebuilt the transmission on my BMW. Car runs perfect now and I’ll be bringing it back for the next round of work.”
Alan V.“Put a new motor in my truck. Up and running like brand new. Responsive, experienced, and knowledgeable.”
Sammy M. & Austin F.Why Foulks
The difference is how the work is handled.
Owner involved
You are dealing with Tony, not getting lost in a chain-shop handoff.
Clear communication
Updates, options, and expectations stay out in the open from start to finish.
Wide vehicle range
Drag cars, diesel trucks, imports, tractors, swaps, and problem jobs all fit the workflow.
Performance mindset
The shop understands how parts work together, not just what to bolt on.
Contact
Need a build, repair, or straight answer about your setup?
Location
Right off 68th in Stillwater. Easy to find, always available.
Shop details
- Foulks Performance
- 6219 E 68th St, Stillwater, OK 74074
- (405) 714-8364
- tony.foulks@yahoo.com
Common service area
- Stillwater
- Perry
- Cushing
- Ponca City
- Perkins
- Glencoe
- Yale
- Pawnee
- Guthrie
Best next step
Send the quote form with your vehicle details, or call/text Tony directly if you need to talk through the project first.
Stillwater Pages
Local service pages built for Stillwater search intent.
These pages go after local searches more directly than the main service pages and give Google cleaner Stillwater-specific targets.
01
Engine Builder Stillwater, OK
Custom engine builds, rebuilds, LS swaps, and street-to-strip combinations for Stillwater customers.
Open page 02Diesel Repair Stillwater, OK
Duramax, Powerstroke, and Cummins diagnosis and repair for work trucks, tow rigs, and daily drivers.
Open page 03EFI Tuning Stillwater, OK
Holley, FAST, and OEM EFI tuning for drivability, street performance, and race-oriented combinations.
Open page 04Transmission Repair Stillwater, OK
Transmission diagnosis, rebuilds, replacements, and performance units for Stillwater-area vehicles.
Open pageExpansion Cities
The first city pages outside Stillwater are now live.
01
Diesel Repair Ponca City, OK
Diesel-focused page built around work-truck and heavy-use vehicle intent in the Ponca City market.
Open page 02Engine Rebuild Cushing, OK
Engine rebuild page aimed at truck, performance, and hard-use vehicle demand around Cushing.
Open page 03EFI Tuning Perry, OK
EFI tuning page tailored to Perry-area performance and drivability search intent.
Open page 04Drag Racing Engine Builder Oklahoma City
Built to reach OKC drag-racing and street/strip searches with a performance-first engine page.
Open page 05Diesel Truck Repair Edmond, OK
Focused on Edmond diesel truck owners who want diagnosis, repair planning, and dependable work.
Open page 06Engine Builder Perkins, OK
Built around Perkins-area engine-build and swap intent with a custom-combination angle.
Open page 07Transmission Repair Yale, OK
Targets Yale drivers needing rebuild-versus-replace answers for truck and automatic transmission problems.
Open page 08Diesel Repair Glencoe, OK
Built for Glencoe diesel owners who need real diagnosis and practical repair planning.
Open page