**GPF explanation- EURO spec cars 2019MY onward have GPF filters. The rest of the world does not. By selecting the GPF bracket option, you will receive a bracket which will aid fitment. The downpipe will not have GPF temperature sensor bosses. They will need to be mapped out completely**

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Designed, tested and manufactured in England to the highest standards, using European stainless steel.

Here's a video from Jamie at Officially Gassed. He has the Fwd version of this on his SEAT Leon Cupra.

This 4" De-cat downpipe was designed to be the first and last downpipe you'll need to buy for your car, regardless of the size of the hybrid that you attach it to!

When you start pushing the OEM turbo, exhaust gas temperatures start to rise (this is the same for the hybrids). This downpipe is about as close to having a bonnet exit exhaust as you can get, without the associated hassle of a section 59!

Key points to bear in mind

• This downpipe is only available with a quality OEM style soft flex. The same style as the one it rolled out of the factory with. Using any other style of flex will simply turn you turbo and downpipe into another engine mount.

• We've utilised the factory downpipe support bracket on the back of the engine block. This was an important thing for us to do, as this will help reduce stresses being transmitted to the turbo and V band connection. 

• Designed and manufactured in England using European 304 stainless steel. 

• Mandrel bent in house using computer controlled machinery.

• All Tig welds back purged.

In over a year of development leading up to the release of this downpipe we've found the following;

• Lower exhaust gas temperatures

• Earlier turbo spool, giving power earlier and holding that advantage across the rev range

• Reduced under bonnet temperatures

• Reduced drone

You'll notice that we resisted the urge to pacify those who think that the whole downpipe needs to be 4 inch. Whilst originally, the fact that you can't get a proper sized flex in the correct position deterred us, testing with full 4 inch prototypes showed it as being unnecessary. Ever heard the term, Diminishing returns? 

Our design allows fitment to cars with completely standard exhausts and cars with most 3" aftermarket exhausts if you select the appropriate adapter from the options.

Unfortunately, we can't cater for all aftermarket connections as there are far too many variables, however if your aftermarket catback exhaust was made with the same mindset as Milltek and the other big manufacturers, our  "Connection to most 3 inch aftermarket exhaust" may work for you.

*Adapter note* - This is mainly aimed at our friends in the USA. We're finding that some aftermarket exhausts need longer adapters. AWE being one that we know of, so we've added the "Extra long 3" extension" option. This adapter will give most people more length than they need. You just need to trim it it suit.

 The Catalyst version of our downpipe will need stage 2 software due to it's positioning. 

*Whilst we use a high quality Euro 6 FIA certified catalyst in this downpipe, we do not suggest that it is a direct replacement for your factory downpipe and be fully compliant with your local laws. The only truly road legal downpipe for you car is the one which it left the factory with. Any one who tries to tell you that their aftermarket downpipe is fully legal is stepping on very thin ice! This is classed as tampering with the emissions system*

Here's another video that we've just found from an independent source.

The reason for showing you this is to highlight the difference between most things available Vs Trackslag.

FAQ's

Q. Will this work with the standard factory turbo?

A. Yes it will. This downpipe will allow the turbo to spool earlier than most standard "Flash" files will be able to cope with. This proves that the downpipe is doing what it was made to do. If your tuner doesn't have the ability to adjust their software, to make the necessary changes to control this, power delivery will be compromised.  

Q. Will the catalyst version pass an inspection?

A. It will pass the UK MOT machine sniffer test but it will still need stage 2 software due to it's positioning. The only truly road legal downpipe for you car is the one which it left the factory with. 

Q. What does the de-cat version smell like? 

A. There's no firm way of answering this. Obviously, it smells of combustion gasses produced by a petrol engine but the strength of this smell will depend on how rich the car is running. On the flipside, a catalyst produces gasses and smells of it's own.

Q. Your catalysts are expensive!

A. You really do get what you pay for with catalysts. Our catalysts are made in Italy and we make very little in the re-sale of them. The quality cores of our catalysts are much bigger than most, so they carry much more precious material than smaller catalysts, hence the price. 

Q. Can I fit the de-cat version to a car that hasn't been mapped? 

A. We always recommend that people get their car tuned to match the hardware on the car. Proper tuning will get the best from our downpipe and the other supporting modifications you have on your car. If you drive the car without getting it tuned, the ECU will see an over-fuel condition and the ECU will reduce fueling to compensate, thus causing a lean condition. Some people fit spacers under the sensor to stop this code showing. If you don't have proper equipment to test what you've done, this is just guesswork.

Q. Do I need to heat wrap or ceramic coat this downpipe?

A. That's entirely up to you. Due to it's size, it runs much cooler than any other downpipe. We do however recommend heat shields where appropriate. Ultimately, we recommend a common sense approach to heat management. 

Q. How much louder than the stock downpipe is it?

A. Whilst our downpipe is so much bigger than standard, it's not so much noisier. In fact, one of the most common pieces of feedback we receive is, how it's quieter than a 3" aftermarket downpipe that it is replacing. Many people are also saying that it's curing drone which was previously present!

Q.Does it fit the standard factory turbo?

A. Yes.

Q. Will it make the standard turbo spool faster?

A. Our downpipe will make all turbos spool quicker but this will be most noticeable on larger hybrids. The car must be tuned to accept this earlier onset of boost.

Q. Will it fit with the aftermarket exhaust that I'm buying?

A. If that Catback exhaust was designed to work with the OEM downpipe, it will work with our downpipe if you choose the appropriate adaptor from the options. That's about the best advice we can give. We kept it simple by making our products work with other OEM parts. If other manufacturers did the same, things will be much easier!

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