Restore Power • Improve Fuel Economy • Protect Your Engine
Gasoline Direct-Injection engines build carbon — period. Over time, that buildup on intake valves chokes airflow, kills throttle response, reduces fuel mileage, and robs horsepower. At Underground Autosports, we bring your engine back to life with our Professional Walnut Blasting Service using dealership-grade media blasting equipment and precision cleaning techniques trusted on performance vehicles worldwide.
What’s Included in the Walnut Blasting Special Package
✔ Full Intake System Inspection
We start by inspecting the intake system, valves, and manifold for carbon buildup severity using high-resolution borescope imaging.
✔ Professional Walnut Shell Media Blasting
We safely remove carbon from intake valves using finely-ground walnut media — no harsh chemicals, no scoring, no shortcuts — restoring smooth airflow and like-new valve surfaces.
✔ Throttle Body Cleaning
Complete cleaning of the throttle body and surrounding air pathway for max throttle response.
✔ Injector & Sensor Check
We verify injector spray patterns, seals, and MAP/MAP sensor performance to ensure no secondary issues are hiding behind carbon buildup.
✔ Oil Catch Can Recommendation (If Needed)
If your platform is known for excessive PCV blow-by, we’ll recommend and quote optional upgrades to keep carbon from returning.
✔ Before & After Photos
Documented results so you can see the difference in engine cleanliness and performance.
✔ Code Scan + Reset
Final diagnostic scan and adaptation reset (when applicable).
⚡ Why Walnut Blasting Matters
Carbon buildup can cause:
Rough Idle/Sputtering
Misfires
Check Engine Lights
Poor Fuel Economy
Loss of Power
Check Engine Lights
Long-Term Engine Wear
Walnut blasting restores your engine’s breathing ability and helps ensure long-term reliability — especially on turbocharged, supercharged, and high-performance builds.
Ask about add-on bundle pricing for spark plugs, injectors, catch can installs, or a custom tune. Book Your Walnut Blasting Appointment Today... Underground Autosports - Where Performance Lives.
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