• CNC Machined V-band flange
  • Fully TIG welded and back purged
  • Lifetime warranty
  • Full 304 stainless construction
  • Fully surfaced flanges for leak free seal
  • Includes all hardware required to fit

9 in stock

SKU: B-EP-DC-PC-ASTRAH Categories: ,


Enhance Performance are pleased to bring you the Astra 1.9 CDTi 16v  2.5″ Pre-cat Decat Downpipe

Upgrading the restrictive OE downpipe with the EP Astra 1.9 CDTi 16v  2.5″ Pre-cat Decat Downpipe is a great way to increase performance and Enhance the exhaust note. Performance is gained through removing exhaust gasses at maximum velocity through the EP downpipe. Designed and manufactured in-house using only premium materials and world-class manufacturing techniques. Delivering unmatched quality and reliability.

  • Designed and manufactured in-house
  • T304L stainless steel construction
  • 63mm CNC Machined inlet flange
  • Argon back-purged TIG welding
  • 63mm outlet thick 10mm precision laser cut flange
  • Surface ground flange for leak free seal
  • Full 63mm/2.5″ bore throughout
  • Brushed and de-burred piping
  • Precision TIG welded o2 bung
  • OEM-style fitment
  • Lifetime warranty

The factory downpipe system consists of smaller, 55mm piping with tight bends and a restrictive high-cell-count catalyst, all of which contribute to restricted performance. We took an unrivalled approach to maximising flow, reducing under bonnet temperatures, and removing restrictions. The 63mm turbine exit transitions slowly into a 63mm three bolt flange, the gradual bends are crucial for maximising performance!

Suitable for OEM & aftermarket cat-back exhaust systems.

Fitting de-cat may result in EML light, a sensor spacer may solve this, but not guaranteed. De-cat for off-road use only.

Additional information


Enhance Performance


Astra H 1.9 CDTI

Product Type

Decats & Silencer Deletes, Exhaust Components