Finally got round to fitting the S3 front brakes and wow what a difference they make. 

I was a little concerned if they would fit or not, but can confirm they fit under 17 inch zenith with 5mm to spare.

 

The later 340mm front brake discs are better than the older 345mm front brake discs. The VW group started to use the 340mm front brake discs on the 2008 Superb, as shown in the chart below.

 

340mm front brake discs weigh about 10.8kg each, whereas the 345mm front brake discs weigh about 12.1kg each.

 

The ventilated part of the 340mm disc is wider at 11mm wide versus only 9.5mm wide on the older 345mm version, so the cooling is better.

 

The brake pads have a larger surface area on the 340mm brake discs, as they are about 175mm wide compared to only about 155mm wide on the older version.

 

The 345mm brakes are an ATE design, whereas the 340mm brakes are a TRW design.

 

340x30mm Front Brake Discs

1K0615301AD

brake disc (vented)

340X30MM 5X112

http://www.oemepc.com/tvn_result/search/tvn/1K0615301AD

 

The 340x30mm 1K0615301AD front brake discs were fitted to the following Europe, Spanish, and Czech built cars

 

Catalog	Model code	Model Name	Years
Audi	A3	Audi A3/S3/Sportb./Lim./qu	2013 2014 2015 2016
Audi	A3CA	Audi A3 Cabriolet	2015 2016
Volkswagen	CC	CC	2012 2013 2014 2015 2016
Volkswagen	GOLF	Golf/Variant/4Motion	2013 2014 2015 2016
Volkswagen	PA	Passat/4Motion/Santana	2011 2012 2013 2014 2015
Volkswagen	PA	Passat/4Motion/Santana	2015 2016
Volkswagen	PACC	Passat CC	2009 2010 2011 2012

 

Catalog	Model code	Model Name	Years
Seat	LE	Leon/Leon 4	2013 2014 2015 2016

 

Catalog	Model code	Model Name	Years
Skoda	OCT	Octavia	2013 2014 2015 2016
Skoda	SUP	Superb	2008 2009 2010 2011 2012 2013
Skoda	SUP	Superb	2014 2015 2016

 

The 345mm front brake disc OEM part number is 1K0615301M

 

Catalog	Model code	Model Name	Years
Skoda	SUP	Superb	2008 2009 2010 2011 2012

 

The Superb MK2 was fitted with both versions, the 345mm version and the 340mm version. Build code 1LK was the 345mm version, and build code 1LA was the 340mm version. 

 

Edited 27 April, 20215 yr by Carlston

Wow, that's a lot of information.

I knew about the weight, but I plan on running passat hubs to counter act it.

It's only a daily driver, but felt that the std brakes are shocking.

If I was planning a track toy I'd be looking at 4 pot brembo etc...

For many the difference is just academic. They are both very powerful brakes.

 

One could argue that the 345mm brakes are more authentic, ie. of the right age/era for the Octavia MK2.

 

The VW group were still using the 345mm brakes until 2013 on many cars such as the Golf/Leon/Superb, and even later than that on a couple of models such as the Golf Cabriolet and the Scirocco...and until 2011 on the Passat.

 

Another advantage to using the older 345mm discs, is cheap brake pads. As parts get older, things often get cheaper.

 

https://www.ebay.co.uk/itm/401016373892?epid=249653324&hash=item5d5e704284:g:D0oAAOSwfsFZdB7j

 

https://www.ebay.co.uk/itm/253048050812?epid=249653324&hash=item3aead6d47c:g:L7gAAOSwqVBZaxfI

Is this direct swap on original hub? 

Yes direct swap onto existing hub, I used s3 hel braided lines. 

13 hours ago, Carlston said:

340mm front brake discs weigh about 10.8kg each, whereas the 345mm front brake discs weigh about 12.1kg each.

 

There is a lot of weight difference between the older ATE and newer TRW calipers The ATE are very heavy but also very stiff, they don't flex like the later TRW caliper

 

13 hours ago, Carlston said:

The ventilated part of the 340mm disc is wider at 11mm wide versus only 9.5mm wide on the older 345mm version, so the cooling is better.

 

Depends on how you are using the brakes, the earlier disc was heavier but that extra weight gave it more capacity to absorb heat. Newer ones are not cooler in practice unless you go for the clubsport ones