991.2 aftermarket exhaust compilation list
03-13-2018, 07:00 PM
#31
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The iPE exhausts that are cat-bypass are just resonators. The iPE exhausts that have cats are 100-200 cell count.
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03-13-2018, 09:06 PM
#33
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For anyone interested....We have a 991.2 SpeedTech valved X-Pipe in stock and ready to go. Also, we can fab some HJS core cats to go with it.
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former 1972 911T white, 1984 911 3.2 Targa black, 993 cab white, 993TT arena red, 993TT silver, 996TT speed yellow, 991.1 GT3 white
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991.2 GT3 RS Weissach Racing Yellow
991.2 Turbo S GT Silver
991.2 GT3 Chalk (Manual)
2022 Cayenne White
former 1972 911T white, 1984 911 3.2 Targa black, 993 cab white, 993TT arena red, 993TT silver, 996TT speed yellow, 991.1 GT3 white
www.speedtechexhausts.com
info@speedtechexhausts.com
Testimonials SpeedTech Exhaust Videos facebook
03-14-2018, 12:06 PM
#34
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This is a good explanation that I found that keeps it simple:
A Catalytic Converter (CAT) is made of many little cells where are deposited high value metals which will take care of oxidizing the gazes that were not fully oxidized in the engine. A 400 CELL Cat means there are 400 of these cells per square inch. As this number goes down, the amount of physical cells decreases therefore generating fewer constraints for the exhaust flows. The good compromise is often to use 200 CELL cats (typically 400 cell is what is used by car manufacturers). If you go too low in CELL value, the oxidation process is not well performed. and a check engine light may appear since there is likely not enough back pressure.
A Catalytic Converter (CAT) is made of many little cells where are deposited high value metals which will take care of oxidizing the gazes that were not fully oxidized in the engine. A 400 CELL Cat means there are 400 of these cells per square inch. As this number goes down, the amount of physical cells decreases therefore generating fewer constraints for the exhaust flows. The good compromise is often to use 200 CELL cats (typically 400 cell is what is used by car manufacturers). If you go too low in CELL value, the oxidation process is not well performed. and a check engine light may appear since there is likely not enough back pressure.
03-14-2018, 12:17 PM
#35
This is a good explanation that I found that keeps it simple:
A Catalytic Converter (CAT) is made of many little cells where are deposited high value metals which will take care of oxidizing the gazes that were not fully oxidized in the engine. A 400 CELL Cat means there are 400 of these cells per square inch. As this number goes down, the amount of physical cells decreases therefore generating fewer constraints for the exhaust flows. The good compromise is often to use 200 CELL cats (typically 400 cell is what is used by car manufacturers). If you go too low in CELL value, the oxidation process is not well performed. and a check engine light may appear since there is likely not enough back pressure.
A Catalytic Converter (CAT) is made of many little cells where are deposited high value metals which will take care of oxidizing the gazes that were not fully oxidized in the engine. A 400 CELL Cat means there are 400 of these cells per square inch. As this number goes down, the amount of physical cells decreases therefore generating fewer constraints for the exhaust flows. The good compromise is often to use 200 CELL cats (typically 400 cell is what is used by car manufacturers). If you go too low in CELL value, the oxidation process is not well performed. and a check engine light may appear since there is likely not enough back pressure.
03-14-2018, 12:21 PM
#36
If I'm not mistaken I think the OEM's are 600 cell count.
03-14-2018, 12:29 PM
#37
03-14-2018, 01:39 PM
#38
https://www.fabspeed.com/universal-o...verter-single/
http://soulpp.com/product/universal-...tic-converter/
03-15-2018, 02:58 PM
#39
03-15-2018, 03:02 PM
#40
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No worries always happy to help out with any questions, thank you!
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03-15-2018, 06:31 PM
#42
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I loved the Kline headers on my 2016 981 Spyder. Loved the new sound...
03-20-2018, 02:40 PM
#45
Since 991.2's come with turbos, will sports cat + exhaust help lessen turbo lag especially in low revs?
I was just thinking of my old 997 Turbo and the Europipe mod not only improved sound but also seemed to have made low rev power more responsive.
I was just thinking of my old 997 Turbo and the Europipe mod not only improved sound but also seemed to have made low rev power more responsive.