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Cat Back Exhaust (Venom Range)

Part number: FD49

Focus ST 250 Performance Exhaust.

Note- This product is designed without a rear box and will be extremely loud.

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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.

These Focus ST performance exhausts are made in 3"/76.2mm pipework and fit from the catalytic converter section backwards (Cat-back) these exhausts replace the centre and rear sections.

This sports exhaust is part of the Cobra Sport Venom range and is extremely loud. This exhaust is sold for non road use only and will exceed all legal noise regulations.

All relevant fittings and gaskets are supplied.


The Ford Focus ST Mk3 was always on the agenda to lend itself to another of Cobra Sports exhaust Venom upgrades, due to the massive success of the marques predecessor.

The Cobra Sport development team again recommended a 3” bore system in order to gain the best results with regards to both power and sound. The final venom development is available in cat-back only option. Independent testing on the cat-back system gave a healthy power increase to 261.5bhp with an 8.27% increase in torque (from 254 ft per lb to 275 ft per lb). There is also an exceptional weight advantage, with the Cobra Sport Venom exhaust being 33.5% lighter than the original equipment cat back system. The new Focus ST Venom system is designed for those seeking a more powerful sound quality and this exhaust does a come with a “Track day use only” warning. After sound testing with the standard O/E front parts the Cobra Sport Venom system was registering a sporty 93.2 dB level compared to the standard 72.1 dB.

Related Media Files

Example of Focus ST Venom sports exhaust (Cat-back).

Example of Focus ST Venom sports exhaust (Cat-back).

Example of Focus ST Venom sports exhaust (Cat-back).

Example of Focus ST Venom sports exhaust (Cat-back).

Example of Focus ST Venom sports exhaust (Cat-back).

Example of Focus ST Venom sports exhaust at Ford Fair(Cat-back).

Rolling road power testing of the Ford Focus ST250 sports exhaust (turbo back - non resonated with de-cat).

Cobra Sport Exhausts Ford promotional video.


Satisfied Visual and Sound RenderingReview by Bruno Grodin
Installation of a cobra sport line on ford st 250 very satisfied with visual and sound rendering  (Posted on 23/07/2018)

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