GASN's New Daytona Coupe Sidepipes

[Georgie]

If you check out the video below and GASN's website you can gather more information about the new Daytona Coupe sidepipes!

https://www.youtube.com/watch?time_continue=1&v=XDupyPhopIY&feature=emb_logo

[Jeff Kleiner]

Those are lovely Georgie but I'm not seeing how they can mate with a header flange which has the 4 pipes oriented like this without the mismatch between them creating a great deal of turbulence and restriction.

https://www.breezeautomotive.com/wp-content/uploads/2018/04/product1_550-4.jpg

What can you tell us about that?

Thanks,
Jeff

[Georgie]

HI Jeff:

Thank you for your question and all the hard work you dedicate to this forum. Everyone at GASN is also very thankful for the Factory 5 team for there last 25 years of hard work and dedication to the kit car market. Those dudes are awesome!

As you know, the gasket you display first of all needs to have the four ports holes cut out so it will work/fit better. Unfortunately, we did not have a Gen 3 coupe at the GASN shop to develop the headers and sidepipes so the fit and flow could be addressed properly and elegantly. I was fortunate to find a customer who wanted to work with my team from a distance and I am very thankful for his patience, expertise and generosity in working with us.

We develop a workable solution not a perfect solution and generating horsepower was not our goal. Our main consideration was to quiet down the sidepipes and improve the current design and make the very best product we could that would add value, reliability, durability and be kick *** beautiful. Please keep in mind that if you have a set of GP/F5 Coyote headers (those folks at GP make gorgeous headers...great guys to work with too) on your GEN 3 coupe the GASN sidepipes will fit using some of Breeze wedges...call Mark Reynolds and he will hook you up!

If anyone has more questions or concerns please call me directly so we can chat in more detail....all the very best to you and your family,
Georgie
781-929-2154
www.gas-n.com

[Jeff Kleiner]

Thanks for the no nonsense reply Georgie! The gasket pictured is exactly the same as the header flange so cutting the center area out will have no effect on the deadhead effect on 2 of the 4 primary pipes where they mate with the sidepipes, and I commend you for not claiming otherwise---"We develop a workable solution not a perfect solution and generating horsepower was not our goal." Man you are absolutely right about the need to quiet the pipes! When we did the first start of the Coyote powered Gen3 that we built at SEMA it was actually painful; I think it is actually more piercing through the FFR sidepipes than through open headers. Again, they are gorgeous and I think a set will eventually be making their way onto the Gen3 that I am working on for my friend.

All the best,
Jeff

[edwardb]

Just to add slightly to Georgie's answer, with the Coyote build in my Coupe there's a collector ahead of the side pipe. So it's not slamming from four pipes to two right at the pipe/header flange. The four exhaust tubes empty into the common collector and then further downstream into the two side pipes. I have to believe that would be somewhat better, but don't have any dyno numbers to prove it and don't expect to. Yes, the goal was to come up with quieter and better looking pipes than the steel standard kit pipes, while still maintaining the classic Daytona twin pipe look. With a nearly 500 hp Gen 3 Coyote in mine, whatever power loss there might be (if any) won't be missed for my purposes. That's not the answer the all-out performance guys (or car show braggers) want to hear. But I'm OK with it.

These are the Gas-N headers in my Coupe:

https://thefactoryfiveforum.com/attachment.php?attachmentid=111550&d=1564525864

And the new Gas-N pipes on the nearly completed build:

https://thefactoryfiveforum.com/attachment.php?attachmentid=120283&d=1578509257

[Jeff Kleiner]

This is true Paul but not all builders are using 4 into 1 into 4 (well, sort of 4) headers. There are Coupes being built with Windsors that have true 4 port headers. That said though the Factory Five pipes create the same bottleneck at the transition into two pipes. Maybe Georgie could be encouraged to develop a 4 into 2 header to mate smoothly with the dual side pipes---hint, hint ;)

Jeff

[edwardb]

This is true Paul but not all builders are using 4 into 1 into 4 (well, sort of 4) headers. There are Coupes being built with Windsors that have true 4 port headers. That said though the Factory Five pipes create the same bottleneck at the transition into two pipes. Maybe Georgie could be encouraged to develop a 4 into 2 header to mate smoothly with the dual side pipes---hint, hint ;)

Jeff

Right. I know you know it, but just pointing out to others that if collectors are used the transition isn't as extreme. Coyote or otherwise, e.g. a Windsor also with collectors for O2 sensors.

[Georgie]

GASN is working on a 351 Windsor header for release in 2020 for the GEN 3 Coupe

[BadAsp427]

Georgie,
These are great looking,,, another awesome job by you and the folks at GAS-N

[Dave Haggland]

I’d be happy to see four-into-four side pipes similar to those on a roadster.

[Jim1855]

Georgie & all,

351 Windsor headers for the Gen 3 Coupe would be great but what heads/ports/bolt spacing would you build them for?

As you know there many port variations and tube size requirements. Then there are bolt spacings from 1.5" to 3" and tube sizes from 1-5/8 to 2". Think AFR 220/225s and 1-7/8 tubes. Big SBF at 550 to 600 HP.

I understand sound and quiet rather than HP but there are a few that build for HP. Yup, coupe pipes are loud, a lot is due to the "drone" into the cabin. A friend has a custom Burns set that requires earplugs, a helmet really helps too.

Jim

[chargerbill]

I'll be purchasing a set.

[Georgie]

No worries Jim...It will support 2" and 3" bolt pattern header flanges and 1-5/8th up to 1-7/8" primaries, double & adjustable collector or 4 bolt flange with no collector.