Vogtland Mustang
Well-Known Member
- Joined
- May 3, 2016
- Threads
- 6
- Messages
- 136
- Reaction score
- 217
- Location
- Australia
- Website
- www.americanspeed.com.au
- First Name
- Fred
- Vehicle(s)
- Mustang GT, Porsche 987 Spyder
KOOKS Headers Update
I have gone through my post and hopefully this time it reads somewhat clearer.
The KOOKS Headers with the Green Cats use a 300 Cell Cat.
Yes a 300 Cell HI FLOW Cat.
Some companies claim to use a 100 Cell Cat, however that does not necessarily mean extra flow over a 300 Cell Cat.
Reason being as the quality of many 100 Cell Cats is often of a dubious nature with nowhere near the correct amount of Palladium and other precious metals that go into making a long term effective Cat.
In order for the Cat to be effective it must generate sufficient heat to convert the pollutants.
If you do not convert the various polluting components effectively you will end up with a Cat Convertor that fills up with gunk and therefore restricts your exhaust flow, similar to having blocked arteries.
So when people claim they have 100 Cell Cats and they are better than a 300 Cell Hi Flow Cat let them come and tell you that in 12mths or so.
If you checked out those cheap 100 Cell Cats then you will normally find that they are clogging up due to not heating up sufficiently or in many cases the Cat is actually starting to come apart internally as the coatings have long burned off.
Most owners would not notice this happening as it is a gradual thing over time.
Also many would not see the blockages occurring as the exhaust is fitted and the last place people would look at would be the Cats.
This is where the extra cost comes into play, its in the cost of the better quality Catalytic Convertors
If you have FLOW you make Horsepower.
In recent testing here in Australia there were gains of around 50HP on one of Rob Herrods Ford Performance Supercharged Mustangs. The proof is in the pudding!!
KOOKS do not make their headers out of mild steel and then throw a coating on them nor do they weld small radiused bend sections per pipe length.
KOOKS use only US Made T304 Stainless Steel.
KOOKS make all of their Headers in house in the USA.
The reason most companies outside of the USA do not make a Stainless Header is primarily cost, both of tooling, labor and the extra cost of quality US made T-304 Stainless Steel.
KOOKS are the leading header manufacturer for Nascar Race Teams, IHRA and NHRA Race teams etc and have been making headers since 1962, they know a thing or two about flow and scavenging.
KOOKS are in the process of making some further mods for our RHD Mustangs in order to cut down the fitment time, which in turn saves you money.
KOOKS Mustang RHD headers should be available Ex Works shortly.
KOOKS will have a few different version available
Price we can normally match and in most cases better any of the legitimate online pricing that you will find on KOOKS and you will have the backup here for any questions or issues.
Our KOOKS Header kits will come complete with ‘Stage 8’ fasteners, COMETIC Exhaust Gaskets, Longer Sensor Wires and there will be additional connector pieces for those of you running BORLA KOOKS to Aftermarket Exhausts. So it will be a complete bolt on kit. Yes we will also have the
KOOKS Exhaust systems available should you want to go with KOOKS all the way or retain your BORLA and bolt straight up.
Hope the above info helps in your decisions when deciding on headers.
I have added some notes taken from various people outside of this forum.
Mild Steel systems need to be coated because otherwise they will rust and you will see this. Consider the rusting on the inside and you would not spend your hard earned if you saw them in a couple of years .
The following is just one of many companies who make informed comparisons between header materials. Its a good read
Stainless Steel vs. Mild Steel
A very popular question concerning the use of Stainless steel over Mild steel in a Competition Header application constantly arises in the industry. Stainless Steel is a better choice when Header lifespan, updates, and quality are an important consideration. A Stainless Steel Competition Header, when properly built, will virtually last you a lifetime.
A Mild Steel Header in a Competition application will soon take its toll from the elements of high exhaust temperature and rust. Performance Welding has tried many Exhaust Coating manufacturers and have found none that will withstand the extreme temperature of a competition engine. On the inside of the primary tubes and at the throat of the Merged Collector, the thermal barrier coating simply cannot withstand the high temperature and after a very short period, the coating burns off and rust begins to generate.
This rust can be disastrous to any engine and can ruin many components.
On initial overlap, there is an inevitable reversion pulse that can send exhaust back up the intake tract. If the rust loosens in the header primary tube it can, and sometimes, will carry some of this abrasive material into your cylinder.
It is highly advisable after leaving Mild Steel Competition Headers over a period of time to take any precautions to remove the rust build up; on initial engine start up this rust can be disastrous.
Stainless Steel Headers have many benefits outweighing the initial cost increase. Due to the fact that they do not need a Thermal Barrier coating you save a few hundred dollars on the initial cost. Stainless Steel Headers can be repaired, or modified at any time in their lifespan due to the simple fact that they do not rust and do not need a Thermal coating. Mild Steel Headers are very tough to repair or modify due to Thermal Coatings and rust.
It is believed that due to Stainless Steel Thermal characteristics, the high exhaust temperature is retained inside the primary tubes and can increase the exhaust speed in the header, which in a Competition Racing Header sometimes is an important goal. Due to the simple fact that there is no rust generated, the inside of each primary tube will stay smooth and flow accordingly.
Performance Welding Racing Headers feel strongly about the use of Stainless Steel in your Competition Header application. If you have a Race vehicle that you truly wish your Competition header to last a lifetime, or if we have a proven Competition Header for your engines combination, or you simply like the benefits of Stainless Steel we highly recommend it in any Competition Header application.
- Mark Lelchook / Owner
I have gone through my post and hopefully this time it reads somewhat clearer.
The KOOKS Headers with the Green Cats use a 300 Cell Cat.
Yes a 300 Cell HI FLOW Cat.
Some companies claim to use a 100 Cell Cat, however that does not necessarily mean extra flow over a 300 Cell Cat.
Reason being as the quality of many 100 Cell Cats is often of a dubious nature with nowhere near the correct amount of Palladium and other precious metals that go into making a long term effective Cat.
In order for the Cat to be effective it must generate sufficient heat to convert the pollutants.
If you do not convert the various polluting components effectively you will end up with a Cat Convertor that fills up with gunk and therefore restricts your exhaust flow, similar to having blocked arteries.
So when people claim they have 100 Cell Cats and they are better than a 300 Cell Hi Flow Cat let them come and tell you that in 12mths or so.
If you checked out those cheap 100 Cell Cats then you will normally find that they are clogging up due to not heating up sufficiently or in many cases the Cat is actually starting to come apart internally as the coatings have long burned off.
Most owners would not notice this happening as it is a gradual thing over time.
Also many would not see the blockages occurring as the exhaust is fitted and the last place people would look at would be the Cats.
This is where the extra cost comes into play, its in the cost of the better quality Catalytic Convertors
If you have FLOW you make Horsepower.
In recent testing here in Australia there were gains of around 50HP on one of Rob Herrods Ford Performance Supercharged Mustangs. The proof is in the pudding!!
KOOKS do not make their headers out of mild steel and then throw a coating on them nor do they weld small radiused bend sections per pipe length.
KOOKS use only US Made T304 Stainless Steel.
KOOKS make all of their Headers in house in the USA.
The reason most companies outside of the USA do not make a Stainless Header is primarily cost, both of tooling, labor and the extra cost of quality US made T-304 Stainless Steel.
KOOKS are the leading header manufacturer for Nascar Race Teams, IHRA and NHRA Race teams etc and have been making headers since 1962, they know a thing or two about flow and scavenging.
KOOKS are in the process of making some further mods for our RHD Mustangs in order to cut down the fitment time, which in turn saves you money.
KOOKS Mustang RHD headers should be available Ex Works shortly.
KOOKS will have a few different version available
Price we can normally match and in most cases better any of the legitimate online pricing that you will find on KOOKS and you will have the backup here for any questions or issues.
Our KOOKS Header kits will come complete with ‘Stage 8’ fasteners, COMETIC Exhaust Gaskets, Longer Sensor Wires and there will be additional connector pieces for those of you running BORLA KOOKS to Aftermarket Exhausts. So it will be a complete bolt on kit. Yes we will also have the
KOOKS Exhaust systems available should you want to go with KOOKS all the way or retain your BORLA and bolt straight up.
Hope the above info helps in your decisions when deciding on headers.
I have added some notes taken from various people outside of this forum.
Mild Steel systems need to be coated because otherwise they will rust and you will see this. Consider the rusting on the inside and you would not spend your hard earned if you saw them in a couple of years .
The following is just one of many companies who make informed comparisons between header materials. Its a good read
Stainless Steel vs. Mild Steel
A very popular question concerning the use of Stainless steel over Mild steel in a Competition Header application constantly arises in the industry. Stainless Steel is a better choice when Header lifespan, updates, and quality are an important consideration. A Stainless Steel Competition Header, when properly built, will virtually last you a lifetime.
A Mild Steel Header in a Competition application will soon take its toll from the elements of high exhaust temperature and rust. Performance Welding has tried many Exhaust Coating manufacturers and have found none that will withstand the extreme temperature of a competition engine. On the inside of the primary tubes and at the throat of the Merged Collector, the thermal barrier coating simply cannot withstand the high temperature and after a very short period, the coating burns off and rust begins to generate.
This rust can be disastrous to any engine and can ruin many components.
On initial overlap, there is an inevitable reversion pulse that can send exhaust back up the intake tract. If the rust loosens in the header primary tube it can, and sometimes, will carry some of this abrasive material into your cylinder.
It is highly advisable after leaving Mild Steel Competition Headers over a period of time to take any precautions to remove the rust build up; on initial engine start up this rust can be disastrous.
Stainless Steel Headers have many benefits outweighing the initial cost increase. Due to the fact that they do not need a Thermal Barrier coating you save a few hundred dollars on the initial cost. Stainless Steel Headers can be repaired, or modified at any time in their lifespan due to the simple fact that they do not rust and do not need a Thermal coating. Mild Steel Headers are very tough to repair or modify due to Thermal Coatings and rust.
It is believed that due to Stainless Steel Thermal characteristics, the high exhaust temperature is retained inside the primary tubes and can increase the exhaust speed in the header, which in a Competition Racing Header sometimes is an important goal. Due to the simple fact that there is no rust generated, the inside of each primary tube will stay smooth and flow accordingly.
Performance Welding Racing Headers feel strongly about the use of Stainless Steel in your Competition Header application. If you have a Race vehicle that you truly wish your Competition header to last a lifetime, or if we have a proven Competition Header for your engines combination, or you simply like the benefits of Stainless Steel we highly recommend it in any Competition Header application.
- Mark Lelchook / Owner
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