Downpipe compatability (TSI)

[The Speedfighter]

OK so I had bid on an ebay one before I posted this thread. turns out I won it. $260 delivered from Germany. 3" SS, no cat and suits MK5 and MK6 engines.

ill see how it goes. thanks for the replies everyone!

please do let us know!!!

[zei20t]

of course

not to say I want to cut sales of local products. just advising people of availability.

should arrive next week

[zei20t]

OK, picked this up from the post office this morning, great quality. yes has the TFSI flange on it which ill have 2 holes elongated to fit the TSI.

[The Speedfighter]

nice pipe mate!!

did you fit it yet??

[zei20t]

hahah I only collected it this morning. if I didn't have to work today I would be at the workshop fitting it up!

[Martin]

Looks awesome, very similar to what I have...and it goes really hard (with StageII ECU)

I'm told that you need and ECU update when installing this downpipe, no ECU changes needed for inlet and intercooler changes

[zei20t]

yup, ill have a stage 2 superchips lined up ready to flash it. it 'compensates' for the lack of temperature change after the cat.

intake, S3 FMIC and cat-back exhaust should take me as far as I want to go engine-wise. at least while its still under warranty

[Martin]

Good to understand the reason why...thanks

I've done the intake, waiting for the APR intercooler

What's with this cat-back exhaust? What's the benefit?
(I'm worried about increasing noise levels any further)

[zei20t]

hmmm APR FMIC. does it keep the factory location or is it right in front?

people say the cat-back exhaust is only noise, but noise and power/torque are related. yes its noisier, but no point having a big down-pipe if youre going to strangle it again 2m down the exhaust.

you can get nice quiet ones at low RPM and idle, but anything aftermarket it will always be noisier than factory.

[Lucas_R]

No need for cat back unless you are wanting the noise - the stock catback flows well enough and is 2.5inch. Its the stock downpipe with the 2x very dense (800 cell i believe) catalic convertors which are the restriction.

Most aftermarket downpipes available for these cars will have either a 100 cell or 200 cell catalic convertor, so between 8-4 times less restrictive than one of the stock cats - and you have 2 of them.

I thought that the "stage 2" CEL flash requirement was that the ECU detected the difference in exhaust gas speed rather than temperature between the 2x o2 sensors. As far as im aware, the CEL illuminates because it detects the air is flowing too rapidy, and assumes the cat has failed. And for this reason, companies like 42DD who make the exhaust 02 spacer like this O2 Sensor Spacer remove the secondary o2 sensor away from the pipe so that it doesnt have as much ezhaust gas flow over it - therefore essentially tricking the ECU.