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

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sanekit

1,500 RPM

sanekit

1,500 RPM
Dec 9, 2015
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What’s your advice for Wira 4g15 stock engine? City drive. No long distance and no track
those mild steel replacement is ok. better flow than the stock cast iron. the SS headers usually got larger diameter piping and longer header design. you'll suffer a bit at low RPM.
racing-4g15.jpg

this is from a seller on mudah. he advertised it as racing extractor. u can see the length of the pipes going down is longer than stock.

stock.jpg

this one is from another seller. advertised as JASMA extractor. design is almost same as the racing one, but has a shorter pipes.

besiputih.jpeg

and this one is your standard besi putih extractor which has a shorter almost stock length piping joints, cheap and cheerful and definitely lighter and better flowing that your stock cast iron. i've used this before on my previous 4g15 auto vdo engine. no complain, does it's job.
 
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Mitevo7

1,000 RPM
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Mitevo7

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Jan 14, 2008
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it's not just the material, design also matters. piping length, diameter etc. :driver:
For non performance engine, using SS is just for aesthetics purpose. You are absolutely correct on diameter, length and stuffs, however i don’t think any company will put serious thoughts when building any headers for non performance engine. As long as it fits the target market demand, they will gladly sell you something they claimed is TUNED length or bla bla bla.

Still, the art of modding is still CUSTOM.
 

vr2turbo

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vr2turbo

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May 11, 2010
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those mild steel replacement is ok. better flow than the stock cast iron. the SS headers usually got larger diameter piping and longer header design. you'll suffer a bit at low RPM.
View attachment 576543
this is from a seller on mudah. he advertised it as racing extractor. u can see the length of the pipes going down is longer than stock.

View attachment 576542
this one is from another seller. advertised as JASMA extractor. design is almost same as the racing one, but has a shorter pipes.

View attachment 576544
and this one is your standard besi putih extractor which has a shorter almost stock length piping joints, cheap and cheerful and definitely lighter and better flowing that your stock cast iron. i've used this before on my previous 4g15 auto vdo engine. no complain, does it's job.
Change my wira one before. 4 to 2 almost same length as original, only the 2 to 1 goes right down which is much longer. Mine the length just reach the nenas so plug and play, no need shift the nenas, save cost......:driver:
 

^pomen_GTR^

7,000 RPM
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^pomen_GTR^

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May 13, 2010
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those mild steel replacement is ok. better flow than the stock cast iron. the SS headers usually got larger diameter piping and longer header design. you'll suffer a bit at low RPM.
View attachment 576543
this is from a seller on mudah. he advertised it as racing extractor. u can see the length of the pipes going down is longer than stock.

View attachment 576542
this one is from another seller. advertised as JASMA extractor. design is almost same as the racing one, but has a shorter pipes.

View attachment 576544
and this one is your standard besi putih extractor which has a shorter almost stock length piping joints, cheap and cheerful and definitely lighter and better flowing that your stock cast iron. i've used this before on my previous 4g15 auto vdo engine. no complain, does it's job.

actually all those 3 extractor have same dimension..

only material and weld quality different... :biggrin:
 

LittleWhiteWagon

1,500 RPM
Senior Member

LittleWhiteWagon

1,500 RPM
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Oct 12, 2009
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about RM700-800?
have to replace because the ori piping having some 'pimples' and maybe some hole some where along the pipe already.
Just get an off the shelf 4-2-1 + 2" pre-made piping that's mandrel bent with a bullet. Some exhaust shops have these.... great way to cut down cost and get proper piping. Hangers all also are made to fit ngam2 for a wira so there's no headache.

Muffler it's your choice of look + sound. Personally I like straight flows any day even if it's a bit louder. Better performance & FC.

S-Flows are super restrictive and FC suffers slightly, but quieter.
 

parakey

1,000 RPM
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parakey

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Apr 30, 2012
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Just get an off the shelf 4-2-1 + 2" pre-made piping that's mandrel bent with a bullet. Some exhaust shops have these.... great way to cut down cost and get proper piping. Hangers all also are made to fit ngam2 for a wira so there's no headache.

Muffler it's your choice of look + sound. Personally I like straight flows any day even if it's a bit louder. Better performance & FC.

S-Flows are super restrictive and FC suffers slightly, but quieter.
+1