LS2 Audi UrS4/S6 Plug and Play Coil Kit Installation

The stock ignition coil system on the UrS4 isn't bad but they are by no means inexpensive or easy to troubleshoot when they start to fail. Naturally, a constant misfire is easy enough to determine but when they start to fail under boost (typical) then a stock coil setup becomes a bit inconvenient to troubleshoot.
Many owners opt for the other Audi coil options such as the red tops and those can be good options as well. In my case, I wanted to run the stock valve cover coil cover which made the LS coil conversion from EFI Express a bit more attractive. Also, the readily available LS coils (virtually any parts store here in the U.S.) made it an even more attractive option. I have now converted all three UrS cars in our family and have yet to have a single ignition related issue with any of them.
This is not a paid review / install. All three kits were purchased at retail.
Link to the kit:
shop.efi-motorsport.com/produ...

[@dogchainsaw3923]

nice

[@dustyrhodes2717]

Not a big fan of these coils, especially on such a factory clean car like you have. There is no performance gain under 400hp. That and the old school chips were used to the factory coils for dwell. On top of that the dwell issues causes starting issues when cold, at least with 1.8T / 2.0T coils.

[@SCARSORGofficial]

I've been running them since 2017 on the pearl car. Didn't really think about them as a performance mod, just more of a convenience mod. I've got old school chips in both the pearl (TAP) and red (Lehmann) and have had zero issues with cold start with these coils (and that includes a number of Minneapolis winters at -15F)... car always starts. Now, my UrS6 Avant with the 1.8 or 2.0T (I forget) coil setup DID have issues starting when really cold as you mentioned.

[@dustyrhodes2717]

@@SCARSORGofficial Ah, good to know they don’t have the cold start issues.