50mm bored SBC TBI 1987-90 full size GM trucks Sierra Silverado Suburban Blazer

This is our direct bolt-on rebuilt and bored 50mm SBC TBI base for your **1987-90 full size GM trucks** flows 680cfm.  This is a bored SBC TBI base, not a BBC This kit will require tuning of the ECM.  It is expected that you have made major modifications to your motor - cam, exhaust, etc and will be making more than 300hp.  If under 300hp, please see our 46mm TBI kit **Fitment: 1987-90 full size GM trucks w/ 4.3L, 5.0L, and 5.7L TBI motor** allstandard or automatic transmissions - this kit will have the correct throttle linkage, ports and IAC/TPS sensor mountings Includes full size Silverado, Sierra, Suburban, Yukon, Tahoe, and full size Blazer C/K/R/V 1500/2500/3500 series - not for S series trucks/blazer **What are you getting here?:** - bored (50mm) remanufactured GM TBI base w/ new throttle shaft bushing - Purge canister ports “J” and “S” are plugged and will need to be plumbed to a low vacuum source such as air cleaner - 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. If you have any questions or need fitment info, please email.   We usually respond within 24hrs - Monday-Saturday. The free listing tool. List your items fast and easy and manage your active items.

• Manufacturer Warranty: Other
• Country of Manufacture: United States
• Manufacturer Part Number: TBI50-87T
• Brand: EPP