mneil Posted April 8, 2020 Report Share Posted April 8, 2020 Having read a few posts recently regarding 981 catalytic converter failures, I did a bit of research and found these: https://www.monasteria-performance.de/epages/17985265.sf/en_GB/?ObjectPath=/Shops/17985265/Products/000029 German engineering and at a reasonable price, + if they really do give just that little bit extra pulling power a bonus! Link to comment Share on other sites More sharing options...
EVO Chris Posted April 8, 2020 Report Share Posted April 8, 2020 They look remarkably like these from top gear https://www.topgear.co.uk/porsche-boxster-cayman-981-manifolds-with-sports-cats?search=boxster manifolds , I have a set on my 987.2, they throw a cel occasionally but in general they are excellent and certainly freed up the system. Link to comment Share on other sites More sharing options...
mneil Posted April 8, 2020 Author Report Share Posted April 8, 2020 Indeed they do @EVO Chris and possibly slightly cheaper not coming from Germany. As yet I've not had a problem with the cats on my 2012 worth 53K on the clock but no doubt they will fall eventually. Given your experience with yours; did they make sufficient difference in performance to warrant the expense? Link to comment Share on other sites More sharing options...
EVO Chris Posted April 8, 2020 Report Share Posted April 8, 2020 14 minutes ago, mneil said: Indeed they do @EVO Chris and possibly slightly cheaper not coming from Germany. As yet I've not had a problem with the cats on my 2012 worth 53K on the clock but no doubt they will fall eventually. Given your experience with yours; did they make sufficient difference in performance to warrant the expense? They did, and cost depends on what your after, if your old ones are no good then a cost effective solution, my original cats were perfect the only reason to change was for better response and noise. I found the 987.2 a little quiet and did not want to go for a full on louder system as drone bothers me. The car is now more responsive, a tad louder with a nice top end rev howl, I also changed to a BMC filter so that may have helped. It was worth doing IMO. Link to comment Share on other sites More sharing options...
mneil Posted April 8, 2020 Author Report Share Posted April 8, 2020 @EVO Chris thanks 😃 Link to comment Share on other sites More sharing options...
mneil Posted April 9, 2020 Author Report Share Posted April 9, 2020 On 4/8/2020 at 3:27 PM, EVO Chris said: They look remarkably like these from top gear https://www.topgear.co.uk/porsche-boxster-cayman-981-manifolds-with-sports-cats?search=boxster manifolds , I have a set on my 987.2, they throw a cel occasionally but in general they are excellent and certainly freed up the system. Set ordered😃. Can you remember if they come with gaskets? Link to comment Share on other sites More sharing options...
Gcar Posted April 10, 2020 Report Share Posted April 10, 2020 On 4/8/2020 at 4:27 PM, EVO Chris said: They look remarkably like these from top gear https://www.topgear.co.uk/porsche-boxster-cayman-981-manifolds-with-sports-cats?search=boxster manifolds , I have a set on my 987.2, they throw a cel occasionally but in general they are excellent and certainly freed up the system. That is because their are all made by the same company in China. Link to comment Share on other sites More sharing options...
EVO Chris Posted April 14, 2020 Report Share Posted April 14, 2020 On 4/9/2020 at 4:40 PM, mneil said: Set ordered😃. Can you remember if they come with gaskets? You do receive gaskets for the manifolds only, not as good as OE so I purchased originals for manifolds and joints to rear box. Link to comment Share on other sites More sharing options...
AnthonyR Posted April 14, 2020 Report Share Posted April 14, 2020 I ordered a new manifold with 200 cell cats from M&M in Germany before the lockdown and it's hopefully being fitted today with a run on the rollers before and after, if it all goes to plan I will post up the results. I choose the M&M because it is much cheaper than the Cargraphic one and comes highly recommended by Jens Ehresmann which will fit in with my long term goal of fitting a bigger capacity engine in my car. Link to comment Share on other sites More sharing options...
AnthonyR Posted April 14, 2020 Report Share Posted April 14, 2020 Car made 321 bhp and 269 lb.ft on the before run, had a bit of a weird spike right at the end of the power run at just before peak revs but we ignored that in the given figure. Link to comment Share on other sites More sharing options...
Patt Posted April 14, 2020 Report Share Posted April 14, 2020 Cheaper option : http://www.carnewal.com/products/981/p81007/200-Cell-Cat-Upgrade Link to comment Share on other sites More sharing options...
AnthonyR Posted April 14, 2020 Report Share Posted April 14, 2020 I gained a total of a whole 9 bhp and 10 lb.ft, lost a little bit of torque low down and gained a bit higher up. My car is still on its original totally uncleaned air filters, I have a set of BMC ones on order and will run it again if they ever turn up from Design 911. Got to be honest I couldn't tell the difference in the power when driving it but I haven't driven it for ages for obvious reasons, however the noise is now epic, a lot louder with a great howl at the top end, which is exactly what I was after. Link to comment Share on other sites More sharing options...
lofi Posted April 14, 2020 Report Share Posted April 14, 2020 6 hours ago, Patt said: Cheaper option : http://www.carnewal.com/products/981/p81007/200-Cell-Cat-Upgrade Nice to see the use of HJS cats. Wouldn’t have anything else Link to comment Share on other sites More sharing options...
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