Trying to do some purchase from Forge to my S3 S3 2001. Couple question hope someone can clairfy - there are 2 model of DV from forge website. FMCL007P and FMCL007P. Can someone tell which is better and the different? - FMDVSPLTR - The Splitter, a Recirculation and Blow Off Valve ... I really interested any effect of performance dropping and how its blow off sounds act.