important

Any problems or issues?

Codes or overheating?

Docmartin

I have an STS kit on my 08 M6. I've had no codes, overheating, or major issues with the kit itself; however, it was already installed when I bought the car. To my knowledge all of the major parts are still original.

The kit has been on the car for around 40k miles. The shop that work on my car thought the kit was great for what I want the car to be... a fun street car that sees the occasional track day at a road course. They did advise me to check the oil every couple fill ups and never let it get too low. Had it re-tuned when I got it, on a dynojet set for 10 psi it made ~590rwhp (4.92k rpm) and ~640rwt (4.59k rpm). It is daily driven and it's a blast to drive.

The kit definitely has advantages and disadvantages. I've had a cold side pipe knocked out of it's sleeve. It will most certainly necessitate hollowing out the cats... mine were melted. Rain makes me nervous, but I've driven it through bad storms. Had a bad PCV at one point.

I'll answer any further questions to the best of my knowledge.

darknit

I've got a pair of low mile sts 57mm turbos for sale. I was gonna build my own kit but decided to just supercharge car instead.

c5wolf

My sts kit isn’t stock but it makes great power with my 5858s.
No codes, but it took a lot to get the a/r housings the right size
to match the converter. Once matched properly it is fun.