A friend of mine tested both Hotbits and PZ extractor for his Satria Neo non CPS years ago. Hotbits have broader mid range torque. PZ's setup you have higher peak HP, close to a linear setup. So it depends on what you want

Any recommendation for Wira 1.5 auto? What to change?

Auto.. i don't think so can change many parts... Drop by to Exss works in Setapak.. Heard good reviews about him.. Price also nice lahhhhhh..

Get a tuned length 4-2-1 extractor, decat and replaced it with a high flow mid box and end up with a S-flow muffler. Piping size you can go up to 1.75" to 1.8" outer diameter

My Persona auto after decat and change to 4-2-1 extractor with one bullet, immediately feel power gain from mid to high rpm, but the sound is not nice like sharp crack sound when rev, then I went back to the shop added 2nd bullet slightly bigger than the first one, now the sound completely gone but power also back like before..how to get back like before but without the sharp cracking sound?

You can't get best of both worlds bro......sad reality

remove all bullet ,put original muffle

Hi sifu2 sekalian. I'm planning to do exhaust upgrade. Got 1 question to ask though.

Is it of any use to add midbox / bullet? Because my pomen suggested cam-pro engine better add 1 mid box. Better have restriction.

4-2-1 Supercircuit header ---> Oval midbox ---> Straight flow muffler

Overall piping 2"

I think 2' quite big for ur engine, last time even using 4G63 NA singlecam 2' piping is adequate, more then that would make it lost power..

What diameter do u suggest bro? A tad bit smaller?

Not sure.. Wait for our sifu to reply as i'm still learning

Hi all sifu,
I plan to mod my myvi 1.3 auto
Just wan to add pick up and fuel save. Any suggestion?

2" inner diameter is okay. No worries

sifu,

im driving persona year 2009, original campro.

due to crack manifold, i hav chg it to 4-1 extractor (stock using 4-1 iianm) and decat.

b4 this, i m very satisfy wif stock exhaust system, wif only chg in muffler (marco).

but after chg to 4-1 extractor and decat, i suffer loss in pickup. its a huge diff if u ask me, need to rev up hi n very noisy sound at the engine.

if lets say i wan to hav the same setup as stock which is:

stock manifold(4-1) > catcon > midbox > muffler

but right now mine is:

4-1 extractor > midbox > muffler

if i put bullet which will become like this:

4-1 extractor > swirl bullet > midbox > muffler

will i get the same (or at least a lil bit same) setup like b4?

im driving every week for 4 hours straight, so long distance driving is making me crazy wif this condition.

thnx

should use 4-2-1 extractor if u want more power on low n mid rpm rev..
4-1 shift the powerband to upper band.. mid to top rev..

Yes, i do know 4-2-1 advantage.
But Stock one using 4-1, so it shud stay the same if im using 4-1 also right? But y sudden loss in power?

I juz wan the same as i got b4 chging the extractor. So will adding bullet gimme the same or maybe a bit like b4

brader auto or manual? sounds like auto...if auto u need S-flow muffler

u can stick to the 4-1 but change to sflow muffler or change to 4-2-1 as mentioned above....either way u need to change 1 lol

u dont need to add another bullet the result will be the same

if your car is manual u should benefit from the less restriction and rev that bugger

Mine is auto.

Oledi using s flow muffler (marco) so dunno whts wrong.

Now the only remaining stock is midbox. Shud i chg it too? Wht type shud i choose? Swirl? Bullet? Spiral? Etc..

How to know if the muffler spoil? Likee the carbon gone?

use bullet type.....but u should be using 4-2-1 if ur auto tho


look inside u can see there is no wire mesh or the sound is like tong kosong ala rempit