SkyNet Posted October 17, 2007 Report Share Posted October 17, 2007 I have the Milltek Catback system, can I mix it with Supersprint CATS + Manifolds?? R32 MkV Exhaust SuperSprint.uk Link to comment Share on other sites More sharing options...
Mook Posted October 17, 2007 Report Share Posted October 17, 2007 Because the Milltek cat-back fits the standard OEM cats, as long as the SS versions are the same diameter, then it should be fine. There have, however, been a few write-ups on here re people with Mk5 R32s using manifolds and cats losing lots of torque. Link to comment Share on other sites More sharing options...
SkyNet Posted October 17, 2007 Author Report Share Posted October 17, 2007 I know!!! But that was Milltek Link to comment Share on other sites More sharing options...
Bogdan Posted October 17, 2007 Report Share Posted October 17, 2007 Yes, and it was because of the manifolds, not the cats.Too much free flow I think and no counter pressure. The SS might be a different matter, I say go for it. Link to comment Share on other sites More sharing options...
SkyNet Posted October 17, 2007 Author Report Share Posted October 17, 2007 [ QUOTE ] Yes, and it was because of the manifolds, not the cats.Too much free flow I think and no counter pressure. The SS might be a different matter, I say go for it. [/ QUOTE ] Da! How is your car running?? No problems yet?? Thz BTW.... Link to comment Share on other sites More sharing options...
mlhj83 Posted October 17, 2007 Report Share Posted October 17, 2007 With regards to the Mk5, I can confirm from my own experience, that the milltek cats will reduce your low down torque, as the milltek downpipes required to fit the cats are of a larger diameter compared to the oem downpipes therefore increasing flow volume but reducing flow velocity, which equals loss of low down torque and gains in the upper rev region. However, the loss of low down torque of the milltek downpipes + cats is less pronounced than the milltek manifold + cats. But either way, I strongly advise against a hiflow sports cats from any manufacturer that increases the bore size of the down pipes and the cats. Ideally, for the Mk5, bore size of the exhaust system should remain the same as oem from the exhaust ports of the engine all the way back to the middle silencer. Also note that, DSG in D mode makes the low down torque loss more obvious as DSG has been programmed from factory to upshift sooner when compared to how you would normally upshift in a manual. Therefore, it is less noticeable in a manual as you would subconsciously compensate that loss of low down torque by upshifting later. The money you would spend on cats and downpipes, would be better spent on some 264/260 schrick cams, which would give you much better gains. Unless, of course, you plan to have forced induction. Link to comment Share on other sites More sharing options...
rs32 Posted October 18, 2007 Report Share Posted October 18, 2007 from my tests (on the MkV) the cats and manifolds lost roughly the same amount of torque. Together they left a massive hole on the low-down torque curve. It took Milltek over a year to admit this despite being told based on the first production run they did Was quite worried about doing the same to the M3 given this experience, but no need - 100 cell cats work just fine Link to comment Share on other sites More sharing options...
VR32 Posted October 18, 2007 Report Share Posted October 18, 2007 The SS does sound pretty awesome, very different to the Milltek cat-back Link to comment Share on other sites More sharing options...
Bogdan Posted October 19, 2007 Report Share Posted October 19, 2007 Looks like is exactly how I predicted: the car is perfect and working fine. No problems what so ever, in fact I've just hit the highest speed you can reach with the stock gear: 290 km/h. Link to comment Share on other sites More sharing options...
Woppum Posted October 19, 2007 Report Share Posted October 19, 2007 SS are the bollox! Link to comment Share on other sites More sharing options...
Bogdan Posted October 22, 2007 Report Share Posted October 22, 2007 Love your breaks Link to comment Share on other sites More sharing options...
EdR32 Posted October 22, 2007 Report Share Posted October 22, 2007 I think the SS sounds better than the Milltek! Link to comment Share on other sites More sharing options...
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