Mi11ar
Registered User
I've seen this sort of thread before but couldn't find it so asking the question, ko3s or ko4 for my 1999 A3 1.8T, am I right in believing that Ko3s is a simple swap for the ko3 and the ko4 requires internals and the rest of it?
What are the Pros and Conns?
What are the Pros and Conns?