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Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts
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ALL DISCOUNTS APPLIED IN CART!

Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System

Price
$9,895.59
Exhaust Type: 2.5" Outlet (For use with OEM muffler)

Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System

Exhaust Type
Price
2.5" Outlet (For use with OEM muffler)
$9,895.59
3.0" Outlet (For use with Dundon muffler)
$9,895.59
Compare product options
📞 Questions before ordering? Call us at 475-227-5381

Dundon Street (Catted) Long Tube header and valved side delete exhaust system for the 991 GT3RS and 911R are available now!  

  • less weight
  • more power,
  • great sound,
  • quiet when you want it to be
  • no drone
  • lifetime structural warranty
  • No CEL
  • 100% 30day money back guarantee
    • if you try it and don't like it, send it back we'll give you your money back).

We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter.  All our products are made in the USA in our shop in Gig Harbor, WA.

By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 25whp gains on the 991.2 GT3, 30whp gains on the 991.1 GT3 and 32whp on the 991.1GT3RS.  This is the most power from a catted 991.2 GT3,  991.1 GT3 Exhaust, 991.1 GT3RS Exhaust or 911R Exhaust system.The Dundon Street Headers on 991 GT3RS and 911R make
445whp Peak
32whp at 8400rpm
29lbft, 24whp gains at 4478rpm

The 991.1 GT3 and RS with the catted system shows it's emissions based camshaft tuning for about 5100-6000rpm area. This stock tuning flattens the power delivery for about 400rpms and then climbs quickly starting at 5400rpm. This is completely fixable with a tune, but understand that many will not want a tune.

You get everything you love about the Dundon Race Headers, 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back!

991 GT3RS 911R Dundon Street (Catted) 445whp peak

Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System - Legends Auto Parts

Dundon - 991.1 GT3RS and 911R Long Tube Street Header Exhaust System

2.5" Outlet (For use with OEM muffler)

$9,895.59
2.5" Outlet (For use with OEM muffler)

Questions?

WE HAVE ANSWERS

How long til' I get my order?

Small items arrive to you in under 1 week

Larger products like full suspension kits must ship freight and can take 1-3 Weeks

Are Installation Instructions Included?

Instructions are included for most parts that require any sort of knowledge to install.

Here's what to do if your parts come WITHOUT instructions:

1. Some parts are genuinely common sense on how they get installed

2. If you can't figure it out on your own, YOUTUBE IS YOUR FRIEND! Our founder started this company from learning how to build headlights off a YouTube Video

3. If there are no videos on YouTube, or instructions anywhere on Google then please CALL OR EMAIL US and we will guide you through or get you instructions from the manufacturer

4. Doing installs on your own is always fun, but sometimes, it isn't. Always consider having your parts professionally installed

ALWAYS CONSIDER US. We sold you the parts, let us install them at THE LAB in Connecticut. We offer enclosed and open cross country transportation.

Of course you won't want to spend thousands on transportation to install lug nuts or emblems but if you are spending a LOT of money on parts, you may just want to send the car our way

What is your return policy if the part doesn’t fit or isn’t what I expected?

If the part was NOT installed, we accept returns within 14 days of delivery.

If the part WAS installed (or attempted installation), we cannot accept a return.

Do your parts come with a warranty?

All parts come with Manufacturer Warranty! Each manufacturer has different warranties so we suggest reading up on their warranty policy before ordering.

I found a better price somewhere else, can you beat it?

YES! If you come across a competitor with a lower advertised price than us, we will BEAT it by at LEAST 1%. Please contact us with proof of the lower priced product.

Do you give out discounts or sponsorships?

NO! We do not give out discounts or do sponsorships. You can get 5% OFF your first order by signing up for text & email notifications. OR just wait until our BLACK FRIDAY Sale that happens once a year.