We are putting this kit on sale for a very limited time to get the word out - act fast or pay more later.

This is our direct bolt-on rebuilt and bored 46mm 590cfm TBI base for your 4.3L 5.0L or 5.7L TBI motor. Stock is 42mm and flows 420cfm.  Good for motors up to 325hp

Fitment: 1987-90 full size GM trucks w/ 4.3L, 5.0L, and 5.7L TBI motor all standard or automatic transmissions - this kit will have the correct throttle linkage, ports and IAC/TPS sensor mountings for the applications listed below

Full size Silverado, Sierra, Suburban, Yukon, Tahoe, and full size Blazer C/K/R/V 1500/2500/3500 series

This kit will work on stock motors (will add about 15hp), or motors w/ headers and free flow exhaust.  It will even work with mild cam upgrades - good for motors up to 325hp.  You don't have to program the ECM if you install with our AFPR or power up kit to adjust fuel pressure to match mild came upgrades.  Larger cam upgrades or head change will require a custom PROM

What are you getting here?:

• bored (46mm) remanufactured GM TBI base w/ new throttle shaft bushing
• direct fit with correct linkage, IAC and TPS hookups and correct ports  
• Installation setup instructions for the TBI base
• Once you complete the installation (about an hour) you will have added 175cfm and up to 105hp over what a stock TBI can flow
• Pictures are generic and TBI base and linkage my differ from shown.  All specifications and hook-ups will be correct for the applications listed.

Payment and Shipping - All orders are usually shipped within 72hrs of payment clearing and we will upload complete shipping info when it goes out.  Payment is expected within 7 days of item conclusion.

If you have any questions or need fitment info, please email.  We usually respond within 24hrs - Monday-Saturday.

Thanks for looking