yes definitely worth it its actually better to go with a new DP rather then a new intake.

Different downpipes will not really change sound. A catted downpipe may make it a little quieter, but by a very very small margin. The catback is your noise maker, with a stock catback and a downpipe you will notice a small increase of the volume of your exhaust. But it wont make it crazy loud.

The front part of a Subaru turbo-back exhaust is known as the downpipe. The downpipe bolts directly to the turbocharger outlet, and collects exhaust gas from the turbine wheel as well as the wastegate. A cat-less downpipe will generally out-flow one with a catalytic converter in it. …

Does Downpipe Require Tuning? Downpipe does not require tuning to work. If you really don’t want a tune or you can’t afford it – you can install downpipe without a tune. Also, tuning your car after a downpipe install has more benefits than just the horsepower.

On a turbocharged vehicle, a downpipe is a part of the exhaust system that connects the turbo exit to the catalytic converter. While it’s generally accepted that installing a downpipe will add “just” 10 to 20 horsepower, that gain is noticeable anytime the turbo is engaged. It adds up to a big increase in performance.

It’s generally accepted that installing a downpipe will add just 10 to 20 horsepower, but that gain is noticeable when the engine is revved up.

Aftermarket downpipe definitely makes a car louder and sound more aggressive. This is because aftermarket downpipes are louder than stock and they reduce the backpressure in exhaust. Allowing sound waves to travel smoothly without collision.

The COBB Tuning GESi Catted 3″ Downpipe is one of the premier modifications most owners look to upgrade on their turbocharged Subaru. By increasing exhaust flow coming out of the turbocharger, an upgraded downpipe provides substantial power gains when combined with appropriate tuning.

The COBB Tuning GESi Catted 3″ Downpipe begins with a CAD designed cast bellmouth that smoothly blends air exiting the turbocharger’s turbine housing. Minimizing turbulence when exhaust gasses from the wastegate join into those flowing through the turbine helps to prevent excessive back-pressure.

Minimizing turbulence when exhaust gasses from the wastegate join into those flowing through the turbine helps to prevent excessive back-pressure. The cast housing is capped off with a COBB logo and auxiliary O2 bung for those wanting to install a wideband sensor early in the exhaust path.