HyperFlow - Down Pipe - Cattless - WRX/STi (01-07)

The Hyperflow Exhaust 01-07 WRX/STI downpipe with catless racepipe uses a massive cast 304 Stainless Steel Bellmouth that tapers to 3.0" piping where it connects to the cat-pipe. This two-piece design allows you to remove the racepipe and add in a high flow catalytic converter without replacing the entire down-pipe assembly.

Features Includes:

• Delete the racepipe without having to buy a whole new downpipe (Catless Race Pipe WS-CP-V2 sold separately)
• Easier installation
• Cast 304 Stainless Steel Bellmouth upper section for maximum exhaust gas flow
• 3.5 inch diameter 304 Stainless Steel pipe tapering smoothly to 3.0 inch
• Spare wideband oxygen sensor bung included
• Modified pipe path to provide more ground clearance for lowered cars than previous design
• TIG welded and polished to a show quality finish