Manufactured from highest quality T304 grade stainless steel
Mandrel bent and fully TIG welded for strength and durability
Free flowing catalyst replacement to get the most from Z18 engine
Designed to improve power and torque across the entire RPM range
Manufactured from highest quality T304 grade stainless steel
Mandrel bent and fully TIG welded for strength and durability
Free flowing catalyst replacement to get the most from Z18 engine
Designed to improve power and torque across the entire RPM range
Manufactured from highest quality T304 grade stainless steel
Mandrel bent and fully TIG welded for strength and durability
New

Gravity Exhaust Decat Manifold – Vauxhall Opel Astra G MK4 1.8 Z18XE 00-04

RRP: £159.99

£148.99 inc VAT (£124.16 + VAT)

Manufactured from highest quality T304 grade stainless steel
Mandrel bent and fully TIG welded for strength and durability
Free flowing catalyst replacement to get the most from Z18 engine
Designed to improve power and torque across the entire RPM range

Available to order

Fpr Gravity Performance, JapSpeed and Direnza products this is not guarenteed stock availibility and is available to order on demand

Estimated delivery by 05/06/2026

SKU: Gravity/GPEM012 Category: Brand:

More Information

Product Information

Fitments

  • Manufactured from highest quality T304 grade stainless steel
  • Mandrel bent and fully TIG welded for strength and durability
  • Free flowing catalyst replacement to get the most from Z18 engine
  • Designed to improve power and torque across the entire RPM range
Weight 16.5 kg
Gaskets

2 x Gaskets

Bolts

3 x Studs

Collector Bore (mm)

63

Branch Bore(s) (mm)

42

Sensor Ports

2

Tech Specs

Specification

Category Manifolds
Brand Gravity
MPN

GPEM012

Ratings