In-person Holley EFI calibration service for naturally aspirated or power adder combos. This is a custom, hands-on calibration done at our shop and preferably at our home track, Napierville Dragway. Every tune is built specifically for your setup and includes power management.

This service is for Holley Terminator X, HP, and Dominator systems only. We support both V5 and V6 software.

What’s included:

• Custom map built for your exact combo

• Startup, idle, fueling, and timing calibration

• Data review and refinement during test hits

Additional info:

• Mechanical work, if needed, is billed at $150/hour

• Service is in-person only ; no remote calibration offered

• We reserve the right to decline vehicles with poor wiring or questionable setups

• Appointments must be pre-approved before booking

After purchase, we’ll reach out to review your setup and coordinate the best time to get you to the track.