The VP12The VP12 is our most powerful Dynamic Soft-Flasher. Operating at 20MHz with plenty of On-Board Memory, the VP12's 8-Bit CMOS microprocessor offers extended compatibility along with faster patching for safer, higher, and more consistent gains.GainsAverage gains for the Silverado 1500 are 10-19HP, or up to 25HP depending on your current modifications. Aftermarket intake, exhaust, and other mods will improve gains. For a more precise estimate, we've created a simple tool on our website to calculate gains given your current modifications.Installation/UseInstallation takes about 15 minutes and requires no special skills. Once installed, press the RESET button to calibrate and you're done!The VP12 does NOT include an OBD-II connector. It connects directly to the OBD-II port's data lines. OBD-II scantools will not interfere with operation.FitsBase Extended Cab Pickup 4-Door      4.3L 262ci V6 OHV       4.8L 294ci V8 OHV       5.3L 323ci V8 OHV Base Standard Cab Pickup 2-Door      4.3L 262ci V6 OHV       4.8L 294ci V8 OHV       5.3L 323ci V8 OHV LS Extended Cab Pickup 4-Door      4.3L 262ci V6 OHV       4.8L 294ci V8 OHV       5.3L 323ci V8 OHV LS Standard Cab Pickup 2-Door      4.3L 262ci V6 OHV       4.8L 294ci V8 OHV       5.3L 323ci V8 OHV LT Extended Cab Pickup 4-Door      4.3L 262ci V6 OHV       4.8L 294ci V8 OHV       5.3L 323ci V8 OHV Lifetime WarrantySatisfaction Guaranteed or Your Money Back
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