Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 1991 GMC Syclone Hi Performance Injector - Submodels with Bosch style injectors - must have computer setup for low resistance - 1600 cc / min Fuel Injector Set.
Period. No Hassle. GUARANTEED.
We cover round trip shipping if we make a mistake.
Check out the video below to view the Guaranteed Exact Fit process from start to finish!