Spider Fuel Injectors w/Return Fuel System FJ503 Compatible with Chevy GMC Isuzu Astro Blazer Express 1500 Silverado Jimmy Safari Savana Sierra 4.3 V6 1996-2014 Replacement for 17113673 19210688

easy install gas mileage improved exponentially 30% maybe in town,mileage went to around 18 mpg. I drove on the highway 80 miles on around 4 gallons of gas prior to that would have taken 3/4 tank easily. It continues to improve a lil but all in all worth every last cent 100% i’d buy again just hopefully not for this Jimmy. Be sure to check all connections before closing the lid it’s easer to correct a problem now because occasionally there’s issues with them.

Fairly easy to install and runs really well, only problem is smoking out the exhaust. I am hoping that it's just the old fuel I have in it and will clear up doesn't smell like antifreeze or oil just a funny fuel smell.

I bought this part because of the good price. It was supposed to be a direct fit replacement. It did lock into the intake manifold, but the top cover for the intake may need to be changed because I could not lock the electrical connector into the fuel injector assembly. This was not the fault of the manufacture.

Had to order this twice. The first one had a broken pin. Reordered and sent the first one back. Second one worked great ...fir 2 weeks, injector #1 stopped working. Have to buy locally now and I have to give the parts house this one or pay $100. Core charge.

These are a little tricky to install

I was able to make it work with a returnless style truck! You need some parts from your old returnless-style spider so DONT throw it away! Just need to swap out the regulator with the old pressure damper and the old return plug outta the old spider, and possibly the old screen too. got two years out of a 300 dollar legit rebuilt returnless one before 3 of the injector tubes started to leak! so if this lasts that long I'll be satisfied! I will keep y'all posted in case if the thing bursts into flames lol, but it's done good after a week so far!

Product came in timely manner and fit as should!

As described. Worked well