Agency Power Bellmouth Downpipe Subaru WRX / STI 2008-2014

Agency Power
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Agency Power has been constantly developing and testing new products that simply make your vehicle the best car for street, drag, and road racing. With the release of their all new downpipe, you will be able to give your car the best performance it needs.

The all new Agency Power downpipe is full stainless steel with thick flanges and sturdy hangers. The downpipe is a full 3 inch system that fits to the stock turbo housing or cat delete pipe. Adding this downpipe to your car will give you increased horsepower, increased boost, and improve the air flow that is needed on a turbo charged car. Downpipe fits with the stock donut gasket.

Combine this downpipe with our Agency Power catback exhaust system for an awesome performance gain of horsepower!

Part #: AP-GH-171


5 customers have reviewed this product.

Great deal!

, Feb 20, 2013
Again, an awesome part and high quality! I recommend it!

Reasonable $ for awesome DP

, Mar 23, 2012
If you want a catless DP and need the ability to run a wideband AFR then look no the extra 300 you'd spend on a Cobb and definitely don't waste your money on a two piece Perrin DP!!! the O2 bung is long but cut or bend the heat shield...or just don't use it like I don't because it serves little purpose and is more an annoyance than anything else...also make sure you bend the transmission mount bracket.

Awesome DP

, Sep 8, 2011
fit 2011 wrx no issue agency power is pure quality stuff smooth welds inside flanges.
already has bung welded for wide band 02 with a plug . well thought out not just a big name it is a top quality DP. thanks IIR !

AP down pipe

, Sep 1, 2011
Agency power is quality no fit issues on 2011 wrx . Spool is way faster money well spent!

Good DP for the money

, Jun 22, 2010
Very impressive piece for the $$. Mounts to turbo and stock CBE flawlessly. The stock CBE on my 10 WRX Sedan has a 3" flange that tapers to 2.5" when internal donut gasket is removed. While the mounting bracket fits fine it is very close to the trans crossmember. I decided to trim a bit to prevent rattling. Also, the heat shield that mounts to the underside of the car must be removed or trimmed to fit the O2 sensor because of the elongated mounting tube. Because of these minor issues its a 4 out of 5.

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You're reviewing: Agency Power Bellmouth Downpipe Subaru WRX / STI 2008-2014