Spark plug wires...why the difference? Ignition coil too...

[Bimmerfanatik]

Why do places like Bav and Euro Depot, etc all have seperate wire sets for the e and i? I swear I'm running i wires on my car. 7mm wires I grabbed from some salvage yard. They sure seem to be working...anyone?

Also, is 8mm worth a step up from 7mm? I'm just trying to find little things to upgrade on while I'm replacing them - I know it may not be a HUGE difference (read: im not expecting a 5whp gain) but if it's even remotely noticeable...

One last question. Upgraded ignition coils. Mine is old, and ugly. I found an Accel universal super coil that's chrome...any gain there? Anyone else running an aftermarket coil? It's cheaper than stock too...

[rs4pro3]

I cars use a sensor on the number 6 plug wire that is included brand new, that the eta's don't need so other than that they are identical(the plastic housing differs betweent he years)

[Bimmerfanatik]

I cars use a sensor on the number 6 plug wire that is included brand new, that the eta's don't need so other than that they are identical(the plastic housing differs betweent he years)

Sooo...does the e engine just ignore that sensor? Is it ok to use I wires? What plastic housing are you talking about when you say they differ?

[AdamF 88iS]

I cars use a sensor on the number 6 plug wire that is included brand new, that the eta's don't need so other than that they are identical(the plastic housing differs betweent he years)

Sooo...does the e engine just ignore that sensor? Is it ok to use I wires? What plastic housing are you talking about when you say they differ?

Yes you can use I wires on an E, just cut that little sensor ring off the #6 wire. The plastic housing is the one that runs along the valve cover.