Collection: 3800
GM 3800 – Built Like a Tank, Runs Like Hell
The 3.8L 3800 is GM’s iron-block monster.
Makes torque, takes hits, and keeps on screaming.
NA or supercharged — don’t matter. These things don’t quit.
🔩 Series II & III ready
🧠 Easy to wire, hard to kill
🔥 Derby? Street car? Swap it and send it.
Built for chaos. Runs like a champ.
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98-05 3800 Series II simplified harness bundle
Regular price $460.00 USDRegular priceUnit price / per -
98-05 3800 Tuned ECM
Regular price $130.00 USDRegular priceUnit price / per -
“Party mode” temp sensor meltdown switch
Regular price $120.00 USDRegular priceUnit price / per -
ECM mount bracket
Regular price $55.00 USDRegular priceUnit price / per -
Standard Switch box
Regular price $175.00 USDRegular priceUnit price / per -
Heavy duty spark plug wires
Regular price $40.00 USDRegular priceUnit price / per -
3100/3400/3800 Coil Bracket
Regular price $30.00 USDRegular priceUnit price / per -
W Body Universal Tranny hotwire kit
Regular price $65.00 USDRegular priceUnit price / per -
Multec - EV1 injector adapter
Regular price $3.00 USDRegular priceUnit price / per -
98-05 3800 Simplified wiring harness
Regular price $330.00 USDRegular priceUnit price / per -
DIY OBD2 port kit
Regular price $25.00 USDRegular priceUnit price / per -
04-08 Series 3 3800 tuned ecm
Regular price $200.00 USDRegular priceUnit price / per -
Quick Disconnect switch box
Regular price $225.00 USDRegular priceUnit price / per -
LMMF GIFT CARD
Regular price From $10.00 USDRegular priceUnit price / per -
2 pin to 3 pin temp sensor adapter
Regular price $15.00 USDRegular priceUnit price / per -
3 pin to 2 pin temp sensor adapter
Regular price $15.00 USDRegular priceUnit price / per