Hello, i own an audi s3 apy and would like to increase port size for better airflow. What would be the best option , to convert my small port to large port (by grinding it, machining it, ect...) or buy an AEB head and manifold ? Will the AEB head fit my car ? Is the AEB manifold also going to? Are the valve sizes same for AEB head and my stock APY head?
Thanks a lot!
Thanks a lot!