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Top » Catalog » Engine » Decats & Exhausts » STIDecat » 3inch Bolt On Decat Downpipe Subaru WRX STI 2014-on
Tuning Developments Exhaust Components for the popular Subaru WRX STI 2014-on Models with EJ25 Engine

Item: 3inch Bolt On Decat Downpipe Section

One of many parts available from Tuning Developments for your Subaru WRX STI! Manufactured here in house in the UK, with all joints utilising superior flanges and bolts as opposed to lesser quality sleeve jointing with clamps. The Tuning Developments Decat Downpipe Exhaust Section is made from high quality T304 grade stainless steel, which is mandrel bent ensuring that pipes aren’t crushed or deformed when being bent for better gas flow and sustained pipe bore size throughout the system, this in turn helping to maximise performance gains. On top of all this, the weight of this exhaust section is substantially less than the factory system, improving performance further again! The exhaust is also fabricated with further modifications in mind, neatly tucked up to the underneath of the chassis so that clearance is not an issue, even on lowered cars with coilovers fitted.

This 3inch Decat Downpipe Exhaust Section from Tuning Developments will directly bolt on instead of the factory front section of exhaust, making install very simple and straight forward, it also utilises factory hanging points to ensure fitment is as good as the factory exhaust downpipe.

Checkout our Youtube channel here to listen to various sound clips of the exhaust system, showing various different configurations to give you an idea of the different exhaust notes available.

From doing in depth dyno testing, we expect gains to be anything upto 30bhp from fitting this Tuning Developments Decat Downpipe Exhaust Section, when in conjunction with our 3inch Catback Exhaust System and custom ECUtek Tune. These items are also listed on our webshop so be sure to check those out too! Discounts are available for a ‘Turbo back exhaust system’ consisting of the 3inch Decat Downpipe and also 3inch CAT Back Exhaust from Tuning Developments. Further performance gain can be had from exhaust manifold/header and Cold Air Intake Kit upgrades and ECUTeK ECU Remapping, both available through Tuning Developments, All items are available as Performance Packages for a simple drive in, drive out service also.


Subaru WRX STI 2014-on 3inch Decat Downpipe Exhaust Section
Subaru EJ25 3inch Decat Downpipe Exhaust Section

Trade enquires are welcomed for our range of Subaru Impreza WRX STI products, please contact us for more information on

This product was added to our catalog on Wednesday 21 February, 2018.