wat extractor is dat? y not 421?

long 4-1 or short 4-1. u need to play afr also
enjin use 3 main ingredient to produce power. air (oxygen) +fuel +spark = fire.
tc open throttle increase air, KNN filter is fake K&N ? also increase air.

u still lack of fuel n fire. how to settles this two

i rasa no enough space for it.
there is no pipe length tuning before joint intersection. so i think no diff to use 4-1, 4-2-1, 4-3-1

my travel route mostly highway ,so foremen recommend 4-1 for me ,

what is different between 4-1 and 4-2-1 ?

OMG , fake KNN ?

i think i should set my TC , now race mode 3

i dunno man. original is K&N not KNN <<<< sure fake filter ady

not sure what u r setting tc mode will improve fuel or spark meh?
just air no fuel no spark where got power one

Sorry my fault , is brand K&N ...hahaha

tuning then if after exhaust and intake mod

meaning go remap ?

Yup.

Find powerzone 421. Thanks me later

Recently I replaced the flexible exhaust pipe to straight pipe
The flexible pipe making blinking sound like engine . Almost completely straight pipe ,the small muffler still stick on the end

Hi Sifu, what is flexible exhaust pipe?

Google 🙉

so far as i know 4-2-1 is for low torque, mean below 4000rpm will get good pick up but cant top speed 160h/km?

its ur cam.

I go survey at another exhaust shop ,foremen give me another solution for pick up.

Still stick to 4-1 extractor , but add 1 bullet at center ,he say can gain a bit pick up and also silence the noise ,but top speed will decrease a bit.

is this true ?

Poman try to poptong
U must try the F1 straight pipe

u oso feel suspicious he say like that.
same as taking money from left pocket put right pocket
then urself feel good very much becos richer now

he affordable dun worry man

planning to install 4 2 1 extractor on myvi 1.5's 3sz-ve. i think what's on the market focus on performance. is there any 4 2 1 extractor that improves km/l?