We're introducing our 321SS Long Tube correct tuned length stepped headers and light weight muffler combo for 997.1 3.6L, 997.2 3.8L, 4.0L all bore, and 4.0L/4.2L stroked engines. The system is designed and built by Charles Dundon. Many of you who have 996 GT3's and 997 GT3's know of Charles and his header designs. They make power, sound great, are well made in the USA by Charles, and are guaranteed for life to the original purchaser against cracks, splits, corrosion etc. (repacks of the mufflers not included...)

The system is available in 2 configurations.

1. With Bypass Flaps
You retain your ability to open up the exhaust or quiet it down. It's still a bit louder than stock, but not annoyingly so.

2. No Bypass Flaps
Straight through, no flaps as loud as you like!

Dyno is from an untuned 997.1 GT3RS 3.6L. The dip in the midrange is tunable with a custom Cobb tune (also available from RK). Notice the consistency of the runs with the headers vs the runs without. We have a 3.8L lined up to dyno as well. If there's interest in the 4.0L from PJ's car or the 4.2L from mine we can PM details.





The stock setup in the 997.1/.2 is about 90lbs our system without flaps is 32lbs, and WITH flaps is 36lbs. This is complete header flanges to the exhaust tips including ALL hardware, clamps, straps etc. Big savings over stock, and if you want super light, contact us for a 20ga setup they're about 25lbs, but not part of the group buy...

This is PJS's system


The headers


The system is practically guaranteed to have no CEL, but without cats it is an "racetrack or offroad use only" product. By this we mean that the light is off ALMOST ALL OF THE TIME except in the right conditions it is possible for the ECU to throw a O2 sensor or Cat efficiency fault. If it does, then clear it and drive, and it may be months or years with no CEL again. All of Charles’ current exhaust customers will easily vouch for this and agree that the light is off 99% of the time.

We're looking to get 10 folks interested in the Group Buy at

With Flaps: $6500
Without Flaps: $5650

This is $1000.00 off the retail price, first come first served!

 

If you've got a 991GT3 check out our post on the 991 GT3/RS subforum

https://rennlist.com/forums/991-gt3-...group-buy.html

 

The first few production unit pictures should be this week of the actual setups. Just finishing the last bits on the first production ones.

 

Looks a great system and a welcome adition for choice. I am interested just got to work out the spend.

 

Here is a vid - white car

 

any pics of the finished setup installed? don't see photos of the tips either. what size piping?

 

I had several pics on my old phone but last Thursday I dropped it and stepped on it and It was dead. Most of my stuff was saved but my most recent pics were not saved including these pics of these setups. I have several built already so I can take some pics of those and post them up one day. I will see if I can install one and take some pics as well.

 

We'll get a pict of the 997 back end but you get the idea with this:

 

Here's another but with 3.5" tips (the big engine setups use 3.5" all the way out)

 

Here is my set up

 

Thanks PJ. Also these are 3.5" tips, Charles and I discussed this, it adds weight, but can be added for $200-300 additional if there's enough interest...

 

 

Those look awesomely loud.

 

Definitely louder than stock, but the flaps help so your neighbors don't shoot you and you can still talk in the car when just cruising!

 

damn that's purty!