VW Golf MK7 R & Audi S3 8V Milltek Large Bore Downpipe with Hi-Flow Sports Cat MSVAG05

Direct-fit large bore downpipe for MK7 R and 8V S3 owners chasing real gains. Uses a 200-cell HJS sports catalyst - 75-85% open area versus OEM’s 400-600 CPSI - to slash back pressure on the 2.0 TSI turbo.

• Requires Stage 2 ECU remap - not plug-and-play for stock tuning
• Made from 304 aircraft-grade stainless steel, fully compatible with Milltek cat-backs
• Retains OE lambda positions and legal emissions compliance when mapped correctly
• Includes MSVAG05 downpipe and MSAU617 front connecting pipe