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Your cart is empty.GM TBI power up kit. Includes 1/4" thick injector spacer (design may vary), 14psi regulator spring and instructions on modifying your OEM stock TBI base to add enough fuel and air to support up to a 40hp with power adders such as headers, free flow exhaust intake and small cam upgrades. Adds 14hp on a stock 5.7L TBI motor.
Brian
Reviewed in the United States on May 15, 2024
Put this on when doing a crate engine. It seems to be working ok... Time will tell
Mike Roe
Reviewed in the United States on March 19, 2024
TBS 10203 TBI power up kit Fit perfectly and it boosted performance on my engine.
David Reynolds
Reviewed in the United States on December 30, 2024
Fits and works just like original.
Spencelll
Reviewed in the United States on December 25, 2023
Easy install, results are questionable
Justin Whitman
Reviewed in the United States on April 30, 2023
Definitely more low end power
Charles Wells
Reviewed in the United States on January 22, 2021
Made my Jimmy stop working. I added this and a throttle body spacer and it made my car shoot fireballs then put everything back to stock and my car still doesn’t run right. Super frustrating especially considering it was advertised as helping make more power. I would not recommend buying this product.
KJH77z28
Reviewed in the United States on August 12, 2020
The parts are of good quality and I would advise that if you have not worked on a Throttle Body before you may find this tough. I have work on Throttle Bodies as well as carburetors and this one due to the spring pressure has its difficulty. Once together I bolted it up to my intake and cranked the Truck on the second try. It runs very well and seems to get better with each time I drive the Truck. I can't really say much regarding the horse power increase but i do think that my truck is running better and as well as seems to ideal much smoother.
Christie
Reviewed in the United States on April 29, 2019
Fit great. Not sure about 40hp but noticeable midrange gains
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