When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Thanks for the writeup as this is an option I'm seriously considering. And good to hear that you haven't triggered a CEL (yet); do you know if any other GT4 owner has had a CEL problem with the same headers and mini-cats? Perhaps Fabspeed could jump in here and fill us in ...
PM sent, and I look forward to getting to know more about you and your goals
I would also be happy to chime in on the Catted O2 Spacers we now offer, and Extended Warranty is one of the first to be running Race Headers on a GT4/Spyder drivetrain with our new Catted O2 Spacers.
Now as we all know, the only concrete way of eliminating the CELs from running catless is with an ECU tune (Cobb Accessport with a Protune for the Spyder/GT4). However, O2 Spacers have always been on the market as a means to reduce CEL occurrences and in some cases eliminate them completely. It is by no means a guaranteed no CEL, as every vehicle's ECU may be different in regards to sensitivity to enhanced/deleted cats. That being said, we are always striving for perfection and just recently released our Catted O2 Spacers to further simulate O2 readings within factory specifications. They have been tested extensively on a wide variety of vehicles, including the notoriously cat-sensitive Ferrari 360s/430s, and have consistently resulted in resolving CEL issues far beyond any other version we have tested to date.
It truly is the best alternative on the market to reduce/eliminate the CEL outside of tuning the ECU, and we are quite confident our Spyder/GT4 customers are going to have very good results with these Catted Spacers. Heck our development GT4 went I believe it was about 250miles without setting a code with Race Headers and left without one, and this was with no O2 Spacers and no tune. By no means does should that be assumed for all GT4/Spyders, but goes to show these cars are not as sensitive as others out there. Most shouldn't have a CEL issue, although again results may vary depending on the ECU's sensitivity. In the event of an occasional CEL, simply take a few seconds to clear it with a handy dandy, basic OBD2 scanner (which are a dime a dozen these days anyway haha).
PM sent, and I look forward to getting to know more about you and your goals
I would also be happy to chime in on the Catted O2 Spacers we now offer, and Extended Warranty is one of the first to be running Race Headers on a GT4/Spyder drivetrain with our new Catted O2 Spacers.
Now as we all know, the only concrete way of eliminating the CELs from running catless is with an ECU tune (Cobb Accessport with a Protune for the Spyder/GT4). However, O2 Spacers have always been on the market as a means to reduce CEL occurrences and in some cases eliminate them completely. It is by no means a guaranteed no CEL, as every vehicle's ECU may be different in regards to sensitivity to enhanced/deleted cats. That being said, we are always striving for perfection and just recently released our Catted O2 Spacers to further simulate O2 readings within factory specifications. They have been tested extensively on a wide variety of vehicles, including the notoriously cat-sensitive Ferrari 360s/430s, and have consistently resulted in resolving CEL issues far beyond any other version we have tested to date.
It truly is the best alternative on the market to reduce/eliminate the CEL outside of tuning the ECU, and we are quite confident our Spyder/GT4 customers are going to have very good results with these Catted Spacers. Heck our development GT4 went I believe it was about 250miles without setting a code with Race Headers and left without one, and this was with no O2 Spacers and no tune. By no means does should that be assumed for all GT4/Spyders, but goes to show these cars are not as sensitive as others out there. Most shouldn't have a CEL issue, although again results may vary depending on the ECU's sensitivity. In the event of an occasional CEL, simply take a few seconds to clear it with a handy dandy, basic OBD2 scanner (which are a dime a dozen these days anyway haha).
Open for any other questions, so feel free to ask
Just to confirm, ECU tune/flash is not mandatory with the race headers, but is an option for cars that are stubborn about CELs (or just for someone who wants the tuning), correct?
If I can do race headers without touching my ECU, I'll probably do it.
Just to confirm, ECU tune/flash is not mandatory with the race headers, but is an option for cars that are stubborn about CELs (or just for someone who wants the tuning), correct?
If I can do race headers without touching my ECU, I'll probably do it.
That is correct And of course the Catted O2 Spacers will be able to help with the CEL as well if you did not want to tune the car
I may have missed them but are there any before and after plots from a dyno?
Yes, you can go to FabSpeed's website and they have several dyno charts. I've had sport headers for a while and no CEL (stock tune), but I am told the 200 cell cats will eventually be "burned out" (second hand, I heard this takes a year or so). This probably is highly dependent on how much track time you put on them. Stock cats are 800 cell.
BTW: the headers are *very easy* to install. I have a lift which helps, but if you can get the rear end up and remove both rear tires it just amounts to removing bolts/screws that are relatively easy to access.
If you replace exhaust, the part that goes by the wheel/brakes needs insulation. I may put some insulation on the backside of the headers (side that faces the engine).
Calvin-->no droning, but I have stock PSE exhaust.
Last edited by aryork; 12-31-2016 at 04:41 PM.
Reason: typo
Loaded up the Cobb Stage 2 OTS map last week, very nice bump in power
Today I got the IPD Plenum/82mm GT3 TB installed. See it as my big '**** you' to Porsche for putting a 74mm TB on the GT4 when the 991.1S came with the 82mm TB stock.
Impressions: The Cobb Stage 2 OTS tune integrated flawlessly to the IPD Plenum/82mm TB, no codes, no stumble The stock exhaust sounds 20% louder and there is a very nice bump in power in the mid-range and a smaller bump up too. There is an increased in air induction sound and the throttle response is more lively. The car pulls smoothly to no end without any dips in the midrange anymore (the Fabspeed headers themselves smoothed out 95% of it). Highly recommended modification to complete your bolt ons Don't just settle for that 74mm TB that Porsche purposely gimped the car with
Last edited by ExtendedWarranty; 05-03-2017 at 01:09 AM.
Excellent feedback my friend! This is the kind of feedback the Spyder/GT4 community is looking for on the IPD package. Might be a good idea to put a separate thread for people to start giving their feedback on the intake side of modifying this platform. Doesn't seem to exist at this point haha
05-24-2016, 06:05 AM
The stock exhaust sounds 20% louder and there is a very nice bump in power in the mid-range and a smaller bump up too. There is an increased in air induction sound and the throttle response is more lively. The car pulls smoothly to no end without any dips in the midrange anymore (the Fabspeed headers themselves smoothed out 95% of it). Highly recommended modification to complete your bolt ons 
but positive butt dyno gainz 
