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Cat Back Exhaust (Non-Resonated)

Part number: CT15

Citroen DS3 1.6 THP 155 & Racing Performance Exhaust


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Duologi Finance - Cobra Sport Exhausts

Cobra Sport exhausts systems come with a lifetime warranty for the original purchaser, giving you ultimate peace of mind.

All Cobra Sport exhausts are manufactured in the UK from certified grade 304 stainless steel and TIG welded for a superior quality finish.

EML lights may activate after removing the standard O/E catalyst. An ECU Re-map is recommended to correct this problem and stabilise all power increases.

The product images shown are for illustration purposes only and due to product enhancement may not be an exact representation of the product.

For any questions, queries or simply for our advice on these products call us on + 44 (0)114 244 7123.

Product Description


Cobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality.

This Citroen DS3 performance exhaust is made in 2.5"/63.5mm pipework and fit from the catalytic converter section backwards (Cat-back) these exhausts replace the centre and rear sections.

This non-resonated exhaust makes the system louder as it excludes the centre silencer and therefore, has a sportier exhaust note. This exhaust however, is also available as a resonated version (including centre silencer) which is a quieter option.

All relevant fittings and gaskets are supplied.

Some of the fitted images may show the resonated option.

Cobra Sport Review

Cobra Sport were keen to develop a system for the DS3 which would match the fun and sporty feel of the car. The decision was made to manufacture the systems with 2.5” (62.5mm) mandrel bent T304 stainless steel pipework to allow for maximum gas flow and to deepen the exhaust tone. The completed exhaust systems create a much improved sound track on the DS3. During the 4,000 rpm static test the sound level of the resonated cat back system increased by 3.5db to register 78.4db on the sound meter. The non resonated system takes this a step further recording a more pronounced 82.5db an increase of 8db over the standard system.

Our development car was fully tested on the rolling road with the Cobra Sport cat back exhaust upgrade fitted. This testing revealed a 3.35% increase in horse power recording and impressive 154.3bhp. The testing also revealed excellent gains in torque with a 11.4% increase with the total figure jumping up to just over 200 lb-ft. Mass also reduced providing a weight saving of just over 0.5kg in comparison to its OE counterpart even with the largely increased pipework bore size. All in all these are certainly impressive results for this little car.

Styling options consist of standout 3” & 3.25” twin tailpipes in various styles including the new Blackout Ceramic tips. Available in these options are less obtrusive slash cut tailpipes which compliment the DS3’s aesthetics nicely. All the exhaust variants are designed to remove the restrictive O/E first silencer which produces a more powerful sound track and overall, providing a purposeful but unobtrusive sound quality which in no way interferes with day-to-day driveability. Unrivalled quality is the hallmark of every Cobra Sport exhaust. Each exhaust is engineered to the highest tolerances. Mandrel bending of the stainless steel tubes ensures clean airflow. Jig manufacturing and TIG welding procedures ensure great looks and a superlative finish.

Matt Thomas, Sales Manager at Cobra Sport says “The cat back exhaust system has provided us with some exciting results especially in the torque gained from the 1.6 turbocharged engine. We’ve given the DS3 the sound that it deserved from the factory with the deeper more pronounced exhaust tone. For those looking for a further upgrade and more aggressive sound we are offering a sports cat or de-cat front pipe replacement to turn the DS3 into a great hot hatch”.

Related Media Files

Example of Citroen DS3 sports exhaust (cat back non-resonated).

Example of Citroen DS3 sports exhaust (cat back non-resonated).

Example of Citroen DS3 sports exhaust (cat back resonated).


Great exhaust, sounds amazing, looks amazingReview by Burns
I have had this exhaust fitted on my car, directly by Cobra, for almost a month now and it has enhanced my car greatly, it sounds amazing and has a much better throttle response now. Would definitely recommend this exhaust and it is fully worth the money. (Posted on 01/09/2017)

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