ENA Set of 8 Curved Boot Ignition Coil Pack Compatible with Ford Lincoln Mercury 4.6L 5.4L V8 Replacement for DG508 C1454 C1417 FD503 1L2U12029AA I2LU-12A388-AA C1417 DG473 DG481 DG491

UPDATED Sept 22, 2020, after putting 700 miles on my car. SOHC 4.6L engine efficiency has remained improved by 3-5%! An incredible deal. I remain skeptical that these coils can stand track speed use though as they aren't as beefy as the OEM Ford coils—if I do get this car to the track, I'll keep an eye on performance and update this review (don't hold your breath on that though…this isn't a manual tranny GT so not really a track car).At first, my buddy and I were skeptical that this would really be a good replacement for the failing original ignition coils in a stock 2002 Mustang GT. Immediately, these new ENA coils improved the engine efficiency by an estimated 3-5% from the old, 18 year old coils. See rest of review for my thoughts and specific experiences with this replacement.Why the replacement? Old coil on the #1 cylinder started throwing a P0301 fault (and also a pending P0316 code) back in May 2020. Besides the #1 coil being an obvious issue, hecking other old coils I noted several with torn boots, one besides the #1 with obvious moisture on the boot—the #1 coil was the worst though by far, the only one throwing an engine fault code and there was a lot of water build up in the well from its failed boot. This Mustang had new plugs put in last year so I also checked the #1 plug and it tested fine and was gapped properly, etc. Decided to try out a full set of these ENA coils as it was cheaper to get 8 new ENA coils than getting one OEM ignition coil to just replace the #1, at least two other coils had torn or failing boots, etc so this was a really low risk purchase decision since I figured I could just swap boots if the new coils themselves were not great.The ENA coils are slightly less bulky than the OEMs and were relatively easy to install. At first I only did the driver side, the easy side on the Mustang… where I had temporarily moved the failing #1 coil to the #2 cyclinder while I waited for these new coils to arrive. As soon as they did arrive, I immediately replaced the driver side coils (#2, 4, 6, 8) with these new coils. That improved things a little on the engine and got rid of it throwing a service light when under serious engine load (heavy acceleration with high RPM); definitely that #1 coil had been out of spec (and that was verified by using a multimeter on that old coil's resistant circuit as well). Replacing the passenger side ignition coils completely the following week saw a much greater improvement…Now the Mustang's RPMs at load are 3-5% lower to achieve the same amount of power/ maintain cruising speed with the cruise control on, etc than they were before! When coming to an idle when a lot of the electrical load on the system zeros into the correct resting engine idle speed at rest much quicker than before. Also, the exhaust has much less water condensing on the rear tail pipes, etc, etc. After I had finished work on the passenger side and was trying the engine out for the first time, a neighbor walked by and said the GT sounded like a kitten… a true improvement! So, WOW, so glad I decided to replace all the coils and not just the one that was testing out of spec!I'm really appreciating how smooth the engine and transmission now work together. Based on the raw RPM efficiency number improvements, I'm expecting at least a 1MPG improvement over the old failing coils with the car in the 40-70 mph range. Acceleration is smoother than ever. Not a single bad thing to say about these coils so far. Well, okay, maybe one thing…The spring contact for the plugs are slightly shorter than the older coils. This might be due to sag on the old coils over time. That and the lightly less beefy boot and coil body are the main differences from the stock coils. I got the black ones but if you want to jazz up your engine block, maybe get the color ones that cost a few dollars more? The black ones look closer to the OEM versions so I went with those because I'm trying to keep this vehicle as close to stock as possible. Anyways, now to that one thing that is really is bothering me since the swap… Now that the ignition coils are making the engine work so smoothly, I can sense that one or more of my stock injectors is probably gunky… it's a never ending story with these cars; thank heavens there's deals like these ENA coils! (And I highly doubt that trying to clean or replace the injectors give me a 3-5% improvement efficiency so it's sort of something I might work on if I have to do deeper work on the engine in future, not immediately).

Good quality affordable coils.bought these for second time and got 70k miles of tough work truck use out of them with no issues.

Perfect for the truck

First thing I did when I received them was check the resistance. Across the coil, on 200 ohm setting, the resistance was .6 On 200 k ohm setting, the resistance was 4.9 to the plug, with a slight variation. Very close to the original resistance of .5 and 5. Install was simple, just be sure to use the dielectric grease, makes the installation much easier. Been running good and I have put 200 miles on it so far. Ask me in 50,000 more miles and I don't foresee any problems.

Good fit 1997 Ford F150

Fit perfectly and work great

Fit perfect in my car good shape

Very easy to install and works well. Great price.