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Hey John! I hope they're treating you well! Do you have any new videos you could share with everyone?
-Mike
Hey Mike-
As per our PM's...getting to your shop for the install of my headers is still on my radar for this coming Spring. Looking forward to giving you my hard earned cheddah ; )
Last edited by 911-140.6; 02-26-2019 at 01:29 PM.
Reason: spell
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@tattoodumbbell’s GT4 received a new vinyl wrap! SOUL signature satin straight cut tips with bolt-on x-pipe finish off the rear. Check the car out at the Hershey Swap Meet next weekend if you're coming!
It's track season and we want to equip your GT4 with performance mods for more sound and power. We back our Long Tube Street Headers with a Lifetime Warranty INCLUDING track use, so have no qualms racing with them. The HJS HD 200 cell catalytic converters themselves have a 3 year warranty.
We're standing by to help you improve your GT4, just give us a call any time!
What's the power difference between catted, and non-cat headers?
Thanks
Here are results from third party dyno testing on a Dyno Dynamics dynamometer. Baseline, ECU Tune, and then the catted and catless headers added. You'll notice the headers bring on power earlier in the RPM range which is good for street use. The catless headers will net for peak power especially up in the higher RPM range where the extra flow is critical.
Here are results from third party dyno testing on a Dyno Dynamics dynamometer. Baseline, ECU Tune, and then the catted and catless headers added. You'll notice the headers bring on power earlier in the RPM range which is good for street use. The catless headers will net for peak power especially up in the higher RPM range where the extra flow is critical.
-Mike
Admittedly I’ve seen this chart on your site and have been to lazy to reach out for clarification 🤪 So... the stock GT4 dynos right around 301 and the long tube street headers (catted?) add approx 30hp w/o an ECU tune?
Admittedly I’ve seen this chart on your site and have been to lazy to reach out for clarification 🤪 So... the stock GT4 dynos right around 301 and the long tube street headers (catted?) add approx 30hp w/o an ECU tune?
No problem! That type of dyno does read a bit low compared to Mustang, Dynojet, and others so the numbers are a bit low, but the percentage gains are consistent with what one could expect. We were also told the ECU tune was not as aggressive as one could fully get as that particular car would be seeing sustained and heavy track use. We'd be up for having more third party dyno information generated should someone want to take that opportunity!
Hey Mike, why are the catted headers making more power than the competition past 6375 RPM? I would've thought that would be the main reason for getting a cattless/race header is for the top RPM gains.
Hey Mike, why are the catted headers making more power than the competition past 6375 RPM? I would've thought that would be the main reason for getting a cattless/race header is for the top RPM gains.
The car had not been pro-tuned for the catless headers on that run. These runs were also done on different days. You can most certainly expect higher gains with the catless headers. As mentioned we are very interested in getting more third party dyno runs for the GT4, if anyone is interested please contact us for an initiative.
Why do so many companies insist on branding exhaust tips?! Just make a good looking, quality and awesome sounding product and they will sell themselves! Personally I will never buy an exhaust from a company that insists that I advertise for them everywhere I go. Maybe just include some front fender stickers for the fast and furious crowd...
02-26-2019, 12:35 PM
