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40whp and 30wtq gains with Dundon Motorsports Headers, no flash required!

Old 08-27-2016, 02:22 AM
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Getting materials ordered for the megaphone and slashed megaphone tips! As soon as I have lead times I'll let you guys know!
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Old 08-27-2016, 03:21 AM
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Getting the materials all ordered for production megaphone, slashed megaphone, 4" straight and 4" slash cut.

Will get lead times to everyone once it's all ordered. Doing the tips in 321SS, and getting some Ti in to experiment with... Once we have the design I can get the CF molds set and ordered as well!
Old 08-27-2016, 04:04 AM
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It would be nice to see the non megaphone tips in 321SS from a number of angles Jamie when they are ready...Ti too :-)
Old 08-27-2016, 02:44 PM
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Originally Posted by Macca
It would be nice to see the non megaphone tips in 321SS from a number of angles Jamie when they are ready...Ti too :-)
Charles worked on the adjustable mount and got that set, also made the slash cut megaphones, I think we need a bit more slash cut to make it a little more noticeable. I'll get a picture at the shop today...

Working on the 4" straight and slash cut on Monday. To make these look right and work how we want them to (complete interchangeability) we're having to engineer some solutions...

Here's some pic's of the slashed a few depths...



Dundon Slashed Megaphone tips, Positioned In




Dundon Slashed Megaphone tips, Positioned In


And a bit more protruding


Dundon Slashed Megaphone Tips, Positioned farther out




Dundon Slashed Megaphone Tips, Positioned farther out


They'll fit 997's as well!



997 RS with Straight Megaphone tips

Last edited by Jamie@dundonmotorsports; 08-27-2016 at 08:05 PM.
Old 08-28-2016, 08:03 PM
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No updates on the catted version for the gt3?

Do you know about when they would be available for purchase?
Old 08-28-2016, 08:12 PM
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double post please delete
Old 08-29-2016, 01:55 PM
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Originally Posted by Maxi_z
No updates on the catted version for the gt3?

Do you know about when they would be available for purchase?
We were getting the car back to stock for a baseline to compare the current catted setup to. And we're waiting on a few bits to add to the intake side to see if we can bump the midrange a bit more. Sorry it's taking a bit longer, but it really will be worth it! A few more weeks and we'll have it priced and announced!

Here's are favorite slash cut tip, this is likely the one we will go forward with the 30* slash matches the lower bumper angle...



Dundon slash cut megaphone tips




Dundon slash cut megaphone tips
Old 08-29-2016, 09:05 PM
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Old 10-16-2016, 09:27 AM
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this time i outran a 991.1 TTS from a stand still enjoy the video!
Attached Files
File Type: wmv
My Movi.wmv (3.19 MB, 170 views)
Old 10-17-2016, 03:04 PM
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Nice! Always great to see a Dundon equipped GT3 hang with a TurboS.
Need to get you a stock RS to run against out there! Also you guys need to get vbox's and do 100-200km runs, data would be more consistent vs the drag racing. It is more fun to beat your buddy off the line though!

Jamie
Old 11-15-2016, 11:34 PM
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Default Race Header Production Updates and Modular Tip Production Update

Thank you for all the orders for Race headers, we're restocking on bends and finishing the GT4 header group buy. We're bringing in some more help to keep up with demand. Thank you all for your support and patience as we get the next batch together.

The first batch of tips should be here before the end of the month as well! Won't be long!
Old 12-29-2016, 09:33 PM
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Thank you all for the 991 Race Header orders! We are pushing to get systems on the shelf and ship the 10 systems that are outstanding.

Also good news for those waiting on the modular tips. We should have all in stock, PVD Black and Flame Treated Ti next week! I'll have a separate post up for that.

Thank you for the continued support and Happy New Year!
Old 01-12-2018, 05:02 PM
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Is there a purpose for the valved portion of the race headers? Can the valve be eliminated or can it be purchased with valveless side pipes? I am contemplating cutting the side pipe where the red line is after the 02 sensors to fit a different exhaust that only has a one pipe opening. Thanks

Last edited by drdonger; 01-12-2018 at 05:32 PM.
Old 01-12-2018, 05:18 PM
  #314  
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Was not aware of this product. are the hp gains real? anyone with experience with these?
Old 01-12-2018, 10:49 PM
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Originally Posted by Psup4s
Was not aware of this product. are the hp gains real? anyone with experience with these?
100% Real. I didn't know these guys from Adam when I took a flyer on one of their first sets. This was my 13th exhaust variant on my car. It was the last. Going on my RS as well.

https://rennlist.com/forums/991-gt3-...s-exhaust.html

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