(765) 378-4908


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, LT4 and LT5!


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!


(765) 378-4908


Current harness lead time: 6-8 weeks













































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