Dr. Underhood Automotive Specialist

About

Family-owned. ASE Master + GM Master + HP Tuners certified tuner Doc Underhood. GM V8 platform specialists — does NOT do diesel work. Every job logged into our shop AI brain so we never repeat a misdiagnosis. Real tunes verified on the dyno — not flash-and-pray.

What we do

• HP Tuners ECM/TCM Custom Tuning (GM V8 Trucks)
• AFM/DOD Delete Cam Tunes (GM 5.3 / 6.0 / 6.2 V8)
• Cam Swap Tunes (Cam Motion, Comp Cams, BTR)
• Knock-Verified Spark Tables & VE Table Tuning
• Datalog Diagnostics & Drivability Repair
• OBD-II Diagnostics
• Brake / Suspension / Electrical Service
• Engine Work & Performance Repair
• AI-Powered Pattern-Matched Diagnostics
• Pre-Purchase Inspection
• Maintenance & Tune-Ups
• Authorized JASPER Engines & Transmissions Installer & Dealer (3-year / 100,000-mile nationwide warranty on JASPER reman gas engines, transmissions, marine, differentials)

Specialties

• AFM/DOD Delete Tuning
• GM 5.3 / 6.0 / 6.2 V8 Cam Tunes
• HP Tuners Master-Certified Tuner
• Knock-Verified Spark Tables
• Datalog-Backed Tunes (Not Flash-and-Pray)
• JASPER Reman Engine & Transmission Installs

For the full site, visit https://foreman.drunderhood.com/shop/drunderhood-fortsmith.