4-2-1 Extractor

[Seanboi]

Hi is it legal 2 install e above? or is there ani legal ones around?

how much n how long do they take 2 install?

easy to catch at road blocks or onli inspections?

 

Thanks

[Elantrahatch]

I don't think there is any legal 4-2-1 extractors. It is illegal to change your extractor as well. For my car (matrix), it takes around 2 hours to fix up and around S$50.00 (minus the original price for the 4-2-1).

 

Its quite easy to detect but unless u remove ur cat, the smell from the exhaust is not obvious. Inspections most likely will fail..

[Lanceteo]

1. theres no legal way of doing this

2. highly unlikely to get caught at road block for this

3. inspections 100% fail

 

there are ways to get it done.. everythigns not a crime until u get caught rite? hah

[Seanboi]

u mean u did urs for only $50?

so go inspections how huh?

[Seanboi]

hmm.. so go inspections how?

[Lanceteo]

ask ur workshop emmm

[Seanboi]

PM me lor.

[Mercur1al]

he means that the installation fee was only $50, for the extractor dunno.

[Mercur1al]

aint there legal 4-1 performance/racing extractors?

[Gexer]

4-2-1 should range btw $450 to $600 for iron pipe. stainless steel will cost $150+/- extra.

 

there is legal 4-2-1. this will only be those cars that already comes with 4-2-1 setup.

 

any mod on extractor is illegal. this implies to high flow cat too. but there are ppl who got 4-2-1 approved by LTA. as long as your cat is remain and not replaced by a dummy cat. LTA are more strict to cat than extractors.

 

also 4-2-1 does not always means good for low end. it is still depending car to car basis. AT and MT are totally different.

 

MT

4-2-1 (improve low end)

4-1 (improve mid & high end)

 

AT

4-2-1 (lose low end. good at high only)

4-1 (improve low end and a "good enough" mid and high)

 

TC & SC

4-2-1 (best)

4-1 (bad)

 

dun flame/quote me. this is what i believe and i am sticking to it.

[BMW320i]

Just out of curiosity, what car are you driving ?

[Seanboi]

bro rather gd info. but e price damn steep.

So how did those ppl seek approval from e LTA?

mine's a MT.

[Seanboi]

a sunny. y?

[Jamesgetz]

r u sure that for AT, 4-2-1 is good for high end and 4-1 is good for low end? i thought it's the other way round?

[Spade]

i honestly misunderstood, I thought most cars come with 4-2-1 configurations stock, why change from 4-2-1 to 4-2-1? does it make a difference?

 

I look at my car and I see 4-2-1...

[Lgt1977]

the diameter of the exhause is diff bro

[Spade]

can inspections detect the diameter difference?

[BMW320i]

For NA below 2L, you should be looking at pod filters, 2 1/4 inch S/S catback exhaust with hi flow cats to fully maximise the benefit of the extractors.

 

Go with tuned length with heat wrap.