Absolutely, positively no cutting or welding required for installation (O2 sensor bungs would need to be added to factory downpipes, we are currently developing a downpipe with a HFC) Of course, EuroCode Tuning would never offer a product to our customers without first testing it on our own in-house S4, here are the findings. Dyno Data EuroCode Tuning Long Tube Headers (only mod) vs 100% stock S4 (same day, same dyno) 30.2 WHP gain/23.2 WTQ gain (with noticeable horsepower/torque gains throughout the entire RPM range)

Features:

- Designed and manufactured in California

- Nearly equal length on all three runners per side, tuned for optimal torque and horsepower gain (over nine revisions perfecting the horsepower and torque gains)

- Full T-304 stainless steel construction

- Laser CNC cut head and exhaust flanges

- CNC cut three into one, precision slip fit collectors

- Mandrel bends

- Fully tig welded

- Direct Bolt on to the left hand drive B8 3.0T S4

- Perfect fitment with both the factory and all cat back exhaust systems