🚗 Holley Sniper EFI Self-Tuning Master Kit - 550-511K Review

Fitted on a '66 Chevelle 468 BBC and started on the first turn of the key. looks good and was easy to assemble. The seller I got it from wasn't that good. I am 3 months late. The tracking was wrong and the delivery was reported when it wasn't. couldn't cancel the order because USPS said it was delivered. didn't have to sign because I would ask to sign for the package because of the value

Nothing good, this junk and I'm stuck. Box brown tape to cover the return label, the clear tape was cut, the staples were gone and the touchscreen was missing the protective plastic and to top it off there are metal shavings and some wood. in the throttle body

This is not the best purchase option if you are installing into an older Dodge or Chrysler product. The temperature sensor only has a 3/8 inch NPT thread. Older engines only have 1/4" NPT threads. The Holleys solution is to install or drill a tee in the heater hose and tap on the head or manifold. The instructions say just in the head or intake manifold to put. Holly says it's a universal option. Yes, right. Be prepared to spend hundreds more to get it fit, as well as a few more weeks of time.

Comes with a complete HyperSpark system. I had to figure out how to connect (disconnect) the shift assistant. Connect the switch to the positive (purple) start signal wire. Works perfectly. I don't know exactly why, but no problems so far. I had to purchase and modify riser extensions to accept the O2 sensor. Bought a pair of MerCruiser 1.7 4.3 5.0 5.7 6.2 8.1 350 498 (174117262645) dry exhaust crankshaft spacers on E-Bay. Very happy with this Holley setup.

kit has just about everything you need to get the job done. If you have a large vehicle, e.g. a full size truck, you will need more fuel hose. The kit was 20 feet long, which sounds like a lot until you actually run it. I used my existing metal return so I didn't have to buy more. The return line only sees 3psi or less, so it's fine. You may need to purchase a plateless fuel pump assembly and I had to purchase a different alternator. the one on my truck was 63 amps. with EFI, fuel pump…

Choose this system after reading many reviews about this system and other systems. The system wasn't very difficult to install, but it did require decent mechanical skills. The hardest part was the return line to the gas tank. Even with self-optimization, your motor should run very well. I installed it, it requires a bit of setup and tweaking after installation. I had to call Holly for tech support and they were very helpful. My car has never worked so well. my engine runs very differently now,