Subaru Impreza WRX STI (GRB) Downpipe

SUPERCIRCUIT catless downpipe made for the Subaru Impreza WRX STI 5-door hatch back (GRB) 2.5L AT.

The factory stock downpipe of the Subaru Impreza WRX STI (GRB) with huge catalytic converter on the right and the SUPERCIRCUIT larger bore catless downpipe on the left side of the picture below.

To access to the downpipe, one has to remove the top-mount intercooler from the EJ257 engine of the Subaru Impreza WRX STI (GRB) shown below.

The SUPERCIRCUIT downpipe is designed for direct bolt-on, installed to the outlet of the turbo on the Subaru Impreza WRX STI (GRB) as shown in the pictures below. The SUPERCIRCUIT downpipe is made with grade 304 mandrel bent 3.0" stainless steel pipe and is fully TIG/Argon welded on CNC machined flanges for optimized unrestricted exhaust flow.

At the other end of the SUPERCIRCUIT Downpipe, it is perfectly fitted to the factory stock catback exhaust system, no further mod is required.

This catless downpipe promotes better exhaust flow and is dyno proven to provide plenty of low-end torque and high-end horsepower. It is ideal for ecu remapping/ tuning needs.

To purchase or for more information about the above SUPERCIRCUIT bolt-on catless Downpipe made for the Subaru Impreza WRX STI (GRB) 2.5L AT, please visit us at SuperCircuit exhaust Pro Shop, SS13 Subang Jaya Industrial Estate. Tel: 03 5632 2855 or Send Us A Message using the form on the right of this page.

Please join SuperCircuit Exhaust Facebook for more exhaust news and updates.

Subaru Impreza S204 Downpipe

Just installed the SuperCircuit made 3.0" Downpipe to the Subaru Impreza S204 (GD) with a two-liter (EJ20) H4 engine capable of developing 324 PS (239 kW; 320 bhp) and a six-speed manual gearbox.

To access to the turbo and the downpipe, one must remove the top mount intercooler on the Subaru Impreza WRX STI shown below. We have done it numerous time, so it is no stranger to us here at SuperCircuit Exhaust Pro Shop.

The factory stock downpipe of the Subaru Impreza WRX STI S204 (rear) and the SuperCircuit stainless steel 3.0" mandrel bent catless downpipe (front).

The SuperCircuit downpipe is designed to be able to plug 'n play to the Subaru Impreza EJ20 turbo without any further modification.

This Subaru Impreza WRX STI downpipe is made with grade 304 stainless steel, CNC mandrel bent and TIG welded in-house by our master craftsmen here at SuperCircuit Exhaust Pro Shop.

For more information about the SuperCircuit downpipe made for the Subaru Impreza EJ20, please visit us at SuperCircuit exhaust Pro Shop, SS13 Subang Jaya Industrial Estate. Tel: 03 5632 2855 or Send Us A Message using the form on the right of this page.

Please join SuperCircuit Exhaust Facebook for more exhaust news and updates.

Subaru Impreza WRX STI 2.5 AT Downpipe

SuperCircuit Downpipe installed to the Subaru Impreza Version 10 (GR Wide body Hatchback Version) 2.5L AT.

Firstly, the top mount factory stock intercooler has to be removed from the EJ257.

After removing the intercooler, this is how the factory stock downpipe looks like.

The Subaru Impreza WRX STI (GR) Hatchback 2.5 AT factory stock downpipe in the background VS. SuperCircuit catless 3.0" downpipe in front.

The SuperCircuit stainless steel downpipe for the Subaru Impreza 2.5L GV Version 10 Hatch back is made with grade 304 stainless steel, CNC machine bent 3.0" piping and TIG/Argon welded for perfect fit.

Dyno proven to improve torque and horse power significantly.

For more information about the above SUPERCIRCUIT Catless Downpipe made for the Subaru Impreza WRX STI 2.5L AT (GR Widebody Hatchback version), please contact us at SuperCircuit Exhaust Pro Shop, Sunway. Tel: +6 03 5632 2855 or 'LIKE' the SuperCircuit Exhaust Facebook for more information and product updates.

Subaru Impreza STI 2.5 A/T Full Exhaust System Customization

Subaru Impreza (GE/GH) Hatchback Auto Transmission with 2.5L code name EJ257 boxer engine at SuperCirciut Exhaust Pro Shop for the full exhaust customization.

Firstly, we start with the Subaru Impreza turbo downpipe. It is made with a 3.0" stainless steel CNC mandrel bent piping.

Then hand welded with TIG/Argon.

Secondly, customization of the centre section also with 3.0" stainless steel mandrel bent piping. The extra canister is used to do the sound damping job, so you don't get the annoying drone noise while travelling on the highway. 

The Subaru Impreza quad rear exhaust tailpipes and the custom made muffler box is also made grade 304 stainless steel, then hand welded by our master craftsmen here at SuperCircuit Exhaust Pro Shop.

For more information about the above Subaru Impreza 2.5 Hatchback exhaust customization, please contact us at SuperCircuit Exhaust Pro Shop, Sunway. Tel: +6 03 5632 2855 or join the SuperCircuit Exhaust facebook for more updates.

Subaru Impreza WRX STI (GE/GH) Downpipe

The 3.0" stainless steel donwpipe is specially made to suit the Subaru WRX STI ver.10 (GE/GH) 2.0L EJ207 Boxer Engine with twin scroll turbo charger.

SuperCircuit 3.0" stainless steel donwpipe fitted to the twin scroll turbo charger outlet.

The whole piping is made with a single piece of piping material, CNC mandrel bent to shape, then finished up with TIG-Argon welding.

The bottom part of the downpipe is reduced to the factory exhaust size, just plug 'n play and 100% compatible with the factory exhaust system.

This 3.0" downpipe is made with grade 304 stainless steel, one-piece CNC mandrel bent formation to reduce weld and joint to its minimum, hence maximizing the exhaust flow efficiency.

For more information about the above downpipe, please contact us at SuperCircuit Exhaust Pro Shop, Sunway. Tel: 03 5632 2855 or join the SuperCircuit Exhaust facebook for more updates.