LS1/LS3 Downdraft ITB Kits

Complete Bolt on ITB kit for Gen3 GM LS series V8 engines Options: rectangle or Cathedral port, DBW or cable throttle

This is a complete bolt on kit that will fit ALL LS series GM / Chevrolet engines. LS1/LS2/LS3/L98 etc.

Maintains all standard equipment such as TPS, IAC, fuel rail and injectors. Also comes with high mounted fuel rail option to run secondary injectors or NOS etc.

All throttle cable option has same fitment as LS1 cable, TPS and IAC
DBW actuator option.  VIDEO

Our testing has shown this kit to produce minimum gains of over 30Hp and peak gains up to 45rwHp over the standard intake on a variety of engines ranging from bone stock to highly modified. In all cases with NO loss to mid range torque or power. With proper setup and tuning the highly progressive linkage system supplied with this kit allows it to drives just like an oem tuned vehicle with perfect light throttle drivability, starting and idle control.

All tuning is capable using OEM ecu, please contact us for HP Tuner base tune files designed for ITB throttles

Kit is available with open trumpets or with airbox / scoop.