4-2-1? 4-1? Extractors broken down!

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deenweirdoz

Active Member
Senior Member

deenweirdoz

Active Member
Senior Member
Oct 18, 2008
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For auto which most of the usage for city driving and sometime for long distant drive, it is advisable for 4-2-1 set up?
 

Izso

Boooooossst
Helmet Clan
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Izso

Boooooossst
Helmet Clan
Moderator
Mar 28, 2004
14,864
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KL
stainless steel or mix steel? any different on performance and sound? or just durability
Supposedly stainless steel doesn't rust therefore will last longer. But experience has told me it's rarely ever pure stainless steel. It'll rust somehow if exposed badly enough and long enough. But then again nice and shiny piping sure looks nicely than mixed steel piping.

In terms of performance it's just a matter of weight (assuming you have the correct length and diameter sorted out) cuz both pretty much heat up nearly the same rate, cool down nearly the same rate and all that. The only one with a real difference is titanium piping.
 

minibeany

Known Member

minibeany

Known Member
Apr 30, 2017
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Kuala Lumpur
Supposedly stainless steel doesn't rust therefore will last longer. But experience has told me it's rarely ever pure stainless steel. It'll rust somehow if exposed badly enough and long enough. But then again nice and shiny piping sure looks nicely than mixed steel piping.

In terms of performance it's just a matter of weight (assuming you have the correct length and diameter sorted out) cuz both pretty much heat up nearly the same rate, cool down nearly the same rate and all that. The only one with a real difference is titanium piping.
ah... then save the money... thanks.
 

sanekit

1,500 RPM

sanekit

1,500 RPM
Dec 9, 2015
1,568
144
163
Petaling Jaya
Supposedly stainless steel doesn't rust therefore will last longer. But experience has told me it's rarely ever pure stainless steel. It'll rust somehow if exposed badly enough and long enough. But then again nice and shiny piping sure looks nicely than mixed steel piping.

In terms of performance it's just a matter of weight (assuming you have the correct length and diameter sorted out) cuz both pretty much heat up nearly the same rate, cool down nearly the same rate and all that. The only one with a real difference is titanium piping.
i would stay away from titanium headers unless the weld is done by a reputable person/shop. it would crack easily if not properly weld. headers runs hot compare to pipings running back to the mufflers.
 

Mitevo7

1,000 RPM
Senior Member

Mitevo7

1,000 RPM
Senior Member
Jan 14, 2008
1,300
134
1,663
i would stay away from titanium headers unless the weld is done by a reputable person/shop. it would crack easily if not properly weld. headers runs hot compare to pipings running back to the mufflers.
Generally mild steel is good enough for most applications, you can heat treat it by ceramic coating it. I have used mild steel headers without coating on my old sentra for 13 years without burning out anything in the engine bay. The heat in the engine bay can easily solved by custom heat shield for metal sheet too. Performance wise, i don't feel any much difference compared to SS headers, may be the car is just SLOW so whatever mods also does little improvement.
 

sanekit

1,500 RPM

sanekit

1,500 RPM
Dec 9, 2015
1,568
144
163
Petaling Jaya
Generally mild steel is good enough for most applications, you can heat treat it by ceramic coating it. I have used mild steel headers without coating on my old sentra for 13 years without burning out anything in the engine bay. The heat in the engine bay can easily solved by custom heat shield for metal sheet too. Performance wise, i don't feel any much difference compared to SS headers, may be the car is just SLOW so whatever mods also does little improvement.
it's not just the material, design also matters. piping length, diameter etc. :driver: