[areohbeeM340i]

Originally Posted by mike@x-ph.com

Its always recommended to get colder plugs when tuning the car but since you are keeping it at stage 1 you might not have to do it right away

I was going to change them either way, I'm at 42k miles, should I just replace with stock? Won't be doing anymore then BM3 Stage 1/Charge Pipes/Modified Stock Muffler to the car.

I got the AFE Drop-In from you, arrived this morning

[mike@x-ph.com]

Originally Posted by SSE60M5

I was going to change them either way, I'm at 42k miles, should I just replace with stock? Won't be doing anymore then BM3 Stage 1/Charge Pipes/Modified Stock Muffler to the car.

I got the AFE Drop-In from you, arrived this morning

I believe BM3 recommends 2 step colder plugs even for stage 1

[JaredG_F30]

bm3 recommends the NGK 97506 one step colder then the stock bosch plugs. They are 2 steps colder than the n54 plug. I ran the NGKs for about 25k and they ran well on WOT. Logs were clean but after some age, I was having rough idle and hesitation under light load issues. I had some new stock plugs laying around so swapped those in. I did not gap the plugs but measured the gap before installing and they measured b/w 0.027-0.028". After installation the car idle was very smooth, now issue at light load and logs at WOT are super clean up to redline. I think I'll stick with stock plugs for future changes. This was my personal experience and others have raved about the NGKs, but for me, stock worked out better.

Originally Posted by SSE60M5

I was going to change them either way, I'm at 42k miles, should I just replace with stock? Won't be doing anymore then BM3 Stage 1/Charge Pipes/Modified Stock Muffler to the car.

I got the AFE Drop-In from you, arrived this morning

[Chenpies]

Is anybody here selling a m-performance exhaust or a stock modified one for a 335i in the LA area?