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⚡ Power your V8 with precision — don’t let your ride settle for less!
The FJ504 Spider Fuel Injector is a high-precision, OE-spec replacement injector engineered for Chevy and GMC 5.0L and 5.7L V8 engines from 1996 to 2002. Featuring durable machined metal construction and a dual-port poppet valve design, it ensures optimized fuel delivery and reliable performance across a wide range of popular truck and SUV models. Designed for easy installation with compression and flare connections, this injector is your go-to for restoring factory-level engine efficiency.








| ASIN | B0B8Z9BC9B |
| Best Sellers Rank | #81,474 in Automotive ( See Top 100 in Automotive ) #54 in Automotive Replacement Fuel Injectors |
| Brand | GELUOXI |
| Brand Name | GELUOXI |
| Customer Reviews | 3.7 out of 5 stars 94 Reviews |
| Exterior Finish | Machined |
| Included Components | Fuel Injector |
| Inlet Connection Type | Compression |
| Item Dimensions | 6.3 x 5.5 x 15 inches |
| Item Type Name | Spider Fuel Injector |
| Item dimensions L x W x H | 6.3 x 5.5 x 15 inches |
| Manufacturer | GELUOXI |
| Manufacturer Warranty Description | 1 |
| Material | Metal |
| Material Type | Metal |
| Model Number | FJ504 Spider Fuel Injector |
| Number of Ports | 2 |
| Outlet Connection Size | 0.13 Inches |
| Outlet Connection Type | Flare |
| Specification Met | oe |
| Thread Size | 0.125 inches |
| Thread Type | NPT |
| UPC | 604969165703 |
| Unit Count | 1.0 Count |
| Valve Type | poppet valve |
D**E
Worth buying.
Good price, good product
C**5
Complete garbage cracked plastic housing do not purchase this junk.
Absolute trash, plastic housing cracked after two weeks, engine would not run. Had to redo the entire job because of these horrible parts that aren't even strong enough to hold 60 PSI fuel pressure. You can see here countless complaints about the same issue. Return window closed after a week because they know these parts are junk. Try parts geek instead. Extremely disappointed having the do the entire job twice.
S**T
Same
Awesome
T**R
Product works and price reflecs quality.
While installing the new injector assembly the plastic broke in three places. The tabs that hold it in place broke, one of these studs broke for the fuel lines and part of the plastic housing broke as well. Still usable but frustrating. The factory gasket would not work at all, it's an O-ring and very oversized! I suggest ordering a felpro o-ring kit for $17 to go with this product. The plastic seems brittle so be careful installing
J**S
Bueno
Me funciono
K**K
Fake, and broken
Nowhere on the actual product does it say Delphi, and it came broken, it wouldn’t hold fuel pressure at all even after changing pressure regulator. Got a new one from autozone instead and haven’t had any issues
V**R
fit
works great
R**Y
Good
Good
Trustpilot
3 weeks ago
2 months ago