Welcome to Speartech!
Home of the original LS swap harness developed here over 20 years ago!
We have standalone swap harnesses and complete control systems for all 99+ LS engines/transmissions.
We have standalone swap harnesses and complete control systems for new Gen 5 LT engines/transmissions, with LT5 harness development underway now!
Looking for a complete, turn key powertrain package? You've come to the right place - we have packages available for LS3, LT1, and LT4!
We are the source for 6L80/6L90, 8L90, and 10L90 swap accessories including tap shift products, reverse light CAN relay, neutral safety switch, and more!
Give us a call to get your LS/LT swap project out on the road and start enjoying today's power and reliability in the old classics you love! Speartech - The Original & Still The Best!
Current harness lead time: 10+ weeks