Holley 550-511K Sniper EFI Self-Tuning Master Kit
Guaranteed Fitment
Always the correct part
Added Value
Performance matched parts
In-House Experts
We know our products
Nationwide Delivery
Economy shipping
Holley just brought EFI within range
Body, Exterior & Accessories ❯
Brakes ❯
Towing, Trailer & Truck Accessories ❯
Always the correct part
Performance matched parts
We know our products
Economy shipping
Holley just brought EFI within range
| Description_DEF | Fuel Injection Conversion Kit |
| Description_DES | Sniper EFI Self-Tuning Master Kit |
| Description_EXT | Sniper EFI Self-Tuning Master Kit; 4150 Flange Carb Replacement/Handheld Monitor/EFI Hose/Fuel Pump/Post And Pre Fuel Filters/Return Bulkhead/Hardware; Black Ceramic Finish; |
| Description_FAB | Bolt On Carburetor Replacement |
| Description_FAB | Throttle Body Mounted ECU |
| Description_FAB | 4 Wire Vehicle Connection Battery/Switched Ignition/RPM |
| Description_FAB | Integrated Fuel Pressure Regulator |
| Description_FAB | Integrated Ignition Timing Control & Coil Driver |
| Description_FAB | Color Touchscreen For Setup And Gauge Views |
| Description_FAB | Calibration Wizard No Laptop Required |
| Description_FAB | Self Tuning ECU |
| Description_FAB | Self-Tuning ECU Means You Dont Have To Be A Computer/Tuning Wiz |
| Description_FAB | Wideband Oxygen Sensor Provides Realtime Fuel Map Learn |
| Description_SHO | FuelInjConversionKit |
| Description_MKT | Holley just brought EFI within range |
| Finish | Black |
| Maximum Horsepower | 650 |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet Size | 0.5625 in. - 18 Female O-Ring (AN6) |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| WARNING CA Proposition 65 | Yes |
| Transmission Model | TH350 |
| MAP Sensor | 2 Bar |
| Outlet Size | 0.5625 in. - 18 Female O-Ring (AN6) |
| Flange Type | Dual Bolt Pattern |
| CFM | 800 |
| Length | 10.0000 |
| Width | 15.0000 |
| Height | 26.0000 |
| Weight | 17.0000 |
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Solid hitch with serious strength and clean powder coat, heavy to lift, but installs easy and tows perfectly!!
Shipping was quick and on time - exactly what I needed for my small-block build - would buy again for sure
Weatherbeater mats fit my work truck perfectly. Dropped them in and nothing moves. Truly a great upgrade
Window visors look incredible and feel durable, install was simple. Zero wind noise on the highway!
Leveling kit components were well packed. Instructions lacking, but online videos helped. Rides level now and feels planted.
Found single lifter pairs in stock here when others required full sets, fast shipping got me racing again, hell yeah!!
Rear bumper upgrade looks better than factory plastic. Install was easy, and functionality is miles ahead. Highly recommended.
Tonneau cover fit is excellent. Clear instructions and a smooth install. Delivery to my door was super convenient
Turbo arrived next morning and matched description. Bolted up cleanly and truck is back to full power.
Husband’s birthday grille guard is rock solid, looks sharp he loves it so much!!! Thanks again
Customer service handled a damaged shipment immediately. Refund was painless. I’ll shop here again.
Exhaust system installed in two hours on my first try. Perfect fit and the sound is pure joy.
Yes. Wholesale pricing is available for legitimate businesses that provide a valid business number or equivalent proof. Ongoing purchase volume is required to maintain discount eligibility. One-time personal buyers aren’t eligible.
If a product page clearly lists fitment for your vehicle and the description leaves no reasonable doubt, we’ll cover the cost of return if it doesn’t fit. Exclusions apply if prior modifications cause the issue. When browsing self-serve, you’re responsible for confirming compatibility by checking manufacturer fitment data and notes. If unsure, contact us before ordering and we’ll verify it for you.
We help where possible on a case-by-case basis. Most manufacturers include detailed instructions and tech support contacts. Because our catalog spans hundreds of brands, we can’t provide every torque spec or procedure, but we’ll connect you with the manufacturer if needed.
We don’t guarantee price matching, but we’re happy to review a legitimate in-stock offer from another Canadian retailer. The comparison must include all costs such as product price, shipping, taxes, and fees, and the item must be identical and available for immediate purchase. We won’t lose money to match unsustainable or out-of-stock pricing.
Yes. In-store exchanges happen on the spot when stock is available. For shipped orders, the original item must be returned first. Once received and inspected, we can issue a store credit toward the correct part or replacement. We can’t send a second item while the first is still in your possession without payment for both.
All prices on the site are before tax. GST, HST, or PST is calculated at checkout based on your shipping address..
Find quick solutions to the most common questions about shipping, returns, compatibility, and support.