£129.95 – £174.95
- Specially design for Astra GSi and Zafira GSi.
- Constructed from TIG welded stainless steel pipe
- Larger bore increases airflow, improving engine performance
- Proven to work efficiently at over 500BHP
- Sleek design polished or powder coated in satin or gloss black
- Includes everything you need to replace standard Top Hat & Boost Pipe
- JS Performance silicone coupler
- Stainless steel fixing bolts
- Murray Constant Tension hose clamps – Suitable for high boost pressures
- Easy to install and doesn’t require professional installation
- Low profile tophat to suit all uprated inlet manifolds
- Bead rolled boost pipes for ultimate reliability
- Machined flat top hat for leak free fitment
- Available with Water-Methanol injection boss
The Enhance Performance Ultimate Top Hat & Boost Pipe Kit has been specially design for the Vauxhall Astra GSi and Zafira GSi range.
The Ultimate Top Hat & Boost Pipe are constructed from 63mm stainless steel pipe, that has been TIG welded and back purged to retain a perfect internal flow.
The larger bore increases airflow, improving engine performance especially when combined with an enlarged inlet manifold. The Ultimate Top Hat & Boost Pipe Kit has proven to work efficiently at over 500BHP so it’s perfect for standard or tuned cars.
The kit includes everything you need to replace the standard Top Hat and Boost Pipe. The sleek design enhances the look of your engine bay, you can choose from powder coated satin black, gloss black or a polished finish for your Ultimate Top Hat & Boost Pipe, and the JS Performance silicone coupler comes in a choice of colours.
The Ultimate Top Hat & Boost Pipe Kit also includes stainless steel bolts and Murray Constant Tension hose clamps, so you have everything you need to fit. The kit is easy to install and doesn’t require professional installation.
Additional extras include:
- Extra coupler for most aftermarket intercoolers (not required for Airtec)
- Hose to match stock intercooler
- 1/8th NPT boss for water/methanol injection (please note, blank is supplied if boss is selected, so it is possible to run the pipe without WMI installed)
This is a GSi specific kit, it features no MAP sensor boss. If you require a map sensor boss please see VXR kit.
Please note, kits including stock intercooler hose could be subject to a lead-time of up to 5 working days.
|WMI Injection Boss||
Included, Not Included
Astra H VXR