Custom Tuning Information Request Form -- Sinister Performance, LLC.

Please take a moment and fill out the information below and submit it to us for review.  We should contact you via EMAIL within a few business days about your request.

 Your contact information:

Ship-to Location (city/state/country)


 Your Vehicle Information:

Engine Type
Injection Type
Power Adder
Compression Ratio
Thermostat Temp
Cylinder Head
Transmission Type
Axle Ratio   
VSS Type

Fuel/Spark Management

ECM/PCM Service # (printed on white label tag affixed to computer)
PROM BCC what's this?
Injector Size
O2 Sensor Type
Fuel Pump
Ignition System

Other Variables

Pass-Key (VATS)
Desired Idle Speed rpm COLD   rpm HOT
Top Speed Limiter MPH (10-255)
Rev Limiter maximum allowed engine rpm
EGR System
Tire Size (ex: 215 50r14)
Can you supply us with scan tool data?  


Please list any other modifications you have done to the engine or transmission along with any special requests or requirements:

Not for distribution.
Copyright [Sinister Performance, LLC]. All rights reserved.
Revised: July 11, 2022 .