GlassTop09
Senior Member
For those so interested.................
Here is a Hot Rod article written by Greg Banish containing info gained using his personal 2009 Chevy Corvette C6 (twin turboed) showing proof that using the right designed cats do not restrict exhaust flow vs using straight pipe thus do not restrict engine HP\TQ output capability AND can LEGALLY pass all US EPA Fed emissions stds up to & including the current LEV III & soon LEV IV:
www.hotrod.com
This is what has been missing in the performance world............someone providing real world, verifiable & creditable proof of this capability. Stands to reason that it took an actual OEM Calibration Engineer to do the necessary work to disprove the misdirection\outright untruths that has been so widespread over the last 15-20 yrs.............. Also, there are 2 YouTube videos from Minnoxide podcasts hosting Greg Banish that he also gives more detail on this & on other topics concerning tuning.......both now & the future. Sad part is that G-Sport\GESI has been around for at least the last 10+ yrs making this stuff................
Worth the viewing IMHO...........especially if 1 is actively tuning thru OEM ECUs...............
Also to note:
G-Sport\GESI has also now set up a US branch located in NC that also has an online store so you can now buy these direct from G-Sport\GESI instead of thru a distributorship system (distributors selling their products to a retailer--like Kooks for example) which means that you now can get the benefit of G-Sport\GESI having their products fully US EPA Fed-certified emissions compliant (their logo thus their paid for US EPA Fed cert number etched on the cats themselves.......a US EPA Fed requirement for the product to have "certified condition" status according to the current US EPA Tampering Policies which supersedes "original condition" status.......this went into effect in Jan 1, 2009............thus provides the US EPA acknowledgement of "reasonable basis for conduct".
FYI, Greg Banish also uses these very G-Sport\GESI cats when he is employed to install cats, tune & get a CARB EO# for the finished tune for the customer's performance vehicle (does this work on consignment only thus not for the general public.............).
So now I finally have picked up a pair of these cats (got G-Sport\GESI's new Advanced GenII "mid-bed design" which are compatible w\ the Spanish Oak ECU's emissions programming which is centered around the rear O2 sensors being located\mounted in the cat housing between 2 substrate bricks to correctly measure the % of free O2--or lack thereof--passing thru the 1st brick.......the flow thru the larger sized cat housing instead of thru the actual 2 1\2" exhaust pipe is key to our early 05-10 S197 car's ECU's ability to accurately operate & maintain optimal catalyst function & longevity while also maintaining optimal engine operations as well............just as my current MagnaFlow #5461336 CARB-cert TWC OEM-grade cats are designed & performing--these have developed a crack in 1 of the cat's outer housing where I ran over a rock in the road some 3 1\2 yrs back & put a good dent in the back half of the outer shell that has evolved into a stress crack from the constant heat cycling over the yrs..........not affecting the cat's ability to clean the exhaust but the writing is on the wall sooner or later) to replace my existing MF cats then also get the 2 extra O2 sensor bungs installed so I can then install my Zeitronics ZT-4 Dual WB O2 Sensor Controller & WB O2 sensors (Bosch LU 4.9 UEGO's) that I've had for the last 7 yrs.
Got pictures but they're too large to attach.............even after downsizing them 3 times so sorry.
Here is a Hot Rod article written by Greg Banish containing info gained using his personal 2009 Chevy Corvette C6 (twin turboed) showing proof that using the right designed cats do not restrict exhaust flow vs using straight pipe thus do not restrict engine HP\TQ output capability AND can LEGALLY pass all US EPA Fed emissions stds up to & including the current LEV III & soon LEV IV:
We Have Proof: Catalytic Converters Do Not Rob Horsepower
If they are sized to match your engine's output, there’s no power difference between catalysts and straight pipes.
This is what has been missing in the performance world............someone providing real world, verifiable & creditable proof of this capability. Stands to reason that it took an actual OEM Calibration Engineer to do the necessary work to disprove the misdirection\outright untruths that has been so widespread over the last 15-20 yrs.............. Also, there are 2 YouTube videos from Minnoxide podcasts hosting Greg Banish that he also gives more detail on this & on other topics concerning tuning.......both now & the future. Sad part is that G-Sport\GESI has been around for at least the last 10+ yrs making this stuff................
Worth the viewing IMHO...........especially if 1 is actively tuning thru OEM ECUs...............
Also to note:
G-Sport\GESI has also now set up a US branch located in NC that also has an online store so you can now buy these direct from G-Sport\GESI instead of thru a distributorship system (distributors selling their products to a retailer--like Kooks for example) which means that you now can get the benefit of G-Sport\GESI having their products fully US EPA Fed-certified emissions compliant (their logo thus their paid for US EPA Fed cert number etched on the cats themselves.......a US EPA Fed requirement for the product to have "certified condition" status according to the current US EPA Tampering Policies which supersedes "original condition" status.......this went into effect in Jan 1, 2009............thus provides the US EPA acknowledgement of "reasonable basis for conduct".
FYI, Greg Banish also uses these very G-Sport\GESI cats when he is employed to install cats, tune & get a CARB EO# for the finished tune for the customer's performance vehicle (does this work on consignment only thus not for the general public.............).
So now I finally have picked up a pair of these cats (got G-Sport\GESI's new Advanced GenII "mid-bed design" which are compatible w\ the Spanish Oak ECU's emissions programming which is centered around the rear O2 sensors being located\mounted in the cat housing between 2 substrate bricks to correctly measure the % of free O2--or lack thereof--passing thru the 1st brick.......the flow thru the larger sized cat housing instead of thru the actual 2 1\2" exhaust pipe is key to our early 05-10 S197 car's ECU's ability to accurately operate & maintain optimal catalyst function & longevity while also maintaining optimal engine operations as well............just as my current MagnaFlow #5461336 CARB-cert TWC OEM-grade cats are designed & performing--these have developed a crack in 1 of the cat's outer housing where I ran over a rock in the road some 3 1\2 yrs back & put a good dent in the back half of the outer shell that has evolved into a stress crack from the constant heat cycling over the yrs..........not affecting the cat's ability to clean the exhaust but the writing is on the wall sooner or later) to replace my existing MF cats then also get the 2 extra O2 sensor bungs installed so I can then install my Zeitronics ZT-4 Dual WB O2 Sensor Controller & WB O2 sensors (Bosch LU 4.9 UEGO's) that I've had for the last 7 yrs.
Got pictures but they're too large to attach.............even after downsizing them 3 times so sorry.
