









⚡ Upgrade your ride with precision fuel injection—because your engine deserves the best!
The FJ503 Spider Fuel Injectors are precision-engineered stainless steel components designed for 4.3L V6 engines in Chevy, GMC, and Isuzu vehicles from 1996 to 2014. They deliver superior fuel atomization and volume control, surpassing OEM standards for enhanced engine performance and fuel efficiency. Built to resist corrosion and extreme heat, these injectors come with a 1-year warranty, ensuring reliable, long-term operation.





| Manufacturer | GZGN |
| Part Number | GMCPYZA10001 |
| Item Weight | 1.68 pounds |
| Package Dimensions | 14.21 x 6.3 x 5.31 inches |
| Item model number | GMCPYZA10001 |
| Size | FJ503 |
| Material | Stainless Steel |
| Item Package Quantity | 1 |
| Included Components | Spider Fuel Injectors |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | 1 Year Manufacturer |
B**
Best bang for your buck
Works great, have it on a 2000 chevy silverado with a manual transmission, the previous ones where complete junk once I had these installed I immediately felt the difference, however the first one I purchased seemed to have a fault but no worries, vendor took care of me immediately and sent me a new one free of charge, took about a week or two but regardless the part came and its been working great so far, would 100% buy again if needed in the future.
A**R
Upgraded and can't be happier!
Great price! Fast delivery! Works wonderful! Thank you!
.**.
Bought 2 different sets and problems with both
Bought the first set of these and the injector cup was missing from one of the injectors, ordered a replacement through Amazon and just installed it today. The truck no had a misfire and everything is pointing to the fuel injector(s). I will be removing this and sending it back and will not be ordering again. I do not suggest these for your application.
J**A
Spider
The part fit my truck that was needed.
A**H
Verificar los números de cada injector.
Excelente calidad simplemente cumple con su trabajo, instalado en chevy silverado 1500 2004.
C**S
Reliable
Great products
0**W
Should work in all 4.3 with the spider style intake.
Works good in my 01 jimmy. Looks different than the stock but goes in just the same if not better.My option says the injectors over the original noodles is much better for fuel delivery and throttle response.
F**O
Excelente
Muy bueno
Trustpilot
1 month ago
1 month ago