if sparks i dunno liao... never seen any car can spit sparks out from their exhaust...

More bullets, better sound dampening, more back pressure. Most setup requires at most 2 bullets. This also very much dependent on piping size, muffler type, extractor n engine tuning.

The tip size is mostly for cosmetic purpose.

yes should change all 1 shot... if not its an half arse job...

custom made usually more expensive, depending on which workshop u go to.. and custom made not necessary better as the person who customs it for u might know nuts about ur car setup....

yes

only large exhaust shop carry branded exhaust system because they need to stock in goods... not all exhaust shop as the cash flow to do so....

that is not necessary especially in hot climate country like malaysia... warm air intake is good for cold start to stabilize the rev and warming up the engine fast...

just unplug the hose from the exhaust manifold heat shield and do a proper cold air intake for ur engine...

cold air is better... dun listen ur mechanic sinkalan...

yes should be no problem...

auto or manual??
twincam??.. single cam??.. mivec??...

4-2-1 extractor... 1.8" piping... midbullet... straight flow muffler...

should be ok i think... whats ur exhaust piping diameter??...
4-1 extractor mainly useful for high rpm usage... perhaps good for high revving engine like campro cps... by using s-flow muffler, back pressure is kept in check so u dont lose so much low end torque....

2 bullet + s-flow muffler still noisy??.. if all 3 are working well (fiber still alot), ur sound level should be around the same as stock standard.... check if any unit of it has worn/burn out fiber inside...

extractor - as its name said, it extracts exhaust pulse out from ur engine... a well tuned extractor creates scavenging effect which helps siphon out the exhaust has from combustion chamber (instead of having ur engine piston to push it out)... generally for inline-4 cylinder engine, extractor (or some people might call it header) is normally categorized as 4-2-1 or 4-1 formation depending on how the piping merge together... 4-1 mainly useful for high rev application while 4-2-1 suitable for street driving where most low-mid torque is utilized... of coz, under each category, there are long and shorts of primary piping and secondary piping to be considered besides having it equal or unequal length... and how collector box merge 2 or 4 pipes into 1.... its basically fluid dynamics theory...

bullet is mainly used to suppress the sound of ur exhaust system... it also acts as a "reservior" or some sort to improve on throttle response... too big "reservior" will create turbulance inside which increases restriction in exhaust flow... while having no "reservior" will reduce throttle response as sudden increase in exhaust gas will have to "wait" or "line up" before exiting at the back....

CAT is a short form for catalytic converter... it is a very special resonator box which converts harmful CO gases emiting from ur exhaust into more environmental friendly CO2 gas.... it contants very expensive material inside, which we take for granted as it restricts exhaust flow.... removing the catcon is illegal in certain country.... but in malaysia, so far we are still not restricted to such environmental law... removing ur catcon improves exhaust flow, which will releases more hidden horsepower....

yes... extractor is at the front part of ur exhaust system... attached to ur engine....
bullets are mainly and widely known as noise resonator... it tones down the noise level of ur exhaust... but many exhaust tuner try with different types and size of the bullet to achieve different driving preference...

lets say u are cruising at constant speed at 3k rpm.... the exhaust flow out from ur exhaust will also be constant... when u step on the accelerator pedal, engine suddenly takes in extra air... extra air going in must go out... but during this period, the exhaust flow travelling in ur exhaust pipe is constant... with a bullet, the sudden gush of exhaust pulse will fill up the bullet first... with this, ur engine will still be able to rev freely without having to deal with back pressure of the exhaust...

different engine and different driving characteristics will give u different exhaust setup... ready made "package" allows for general street usage... these "packages" allows buyer to be less blur when changing their exhaust system... of coz, if u know ur fluid dynamics and automotive knowledge well, u can alwiz alter the "common" setting to suits ur own driving preference....

i guess both are almost equally similar in back pressure... having mandrel bent exhaust piping do improve exhaust gas flow... try ask around who had tried both setting to do comparison... i havent tried both of such setting before....

performance will be affected a little... but it will be more on audible side when fiber runs out (or burn out)....
bullet kosong d, change new bullet lor.... just cut and weld new bullet in place only...

there are quite alot of mid section bullets in the market... straight flow oval shape, straight flow round shape, spiral flow, long bullets, etc.... exhaust gas does not need to spiral passing through the piping... it needs to create a smooth pulse which helps in scavenging effect... shape of the mid section bullet determines how much volume inside, which in turn helps ur throttle response, as explained above..

one more thing... exhaust gas is hotter at the front side compare to the rear section because exhaust gas cools down as it flows through the exhaust piping via thermal transfer... exhaust gas travels fastest when it is hot and slows down when it cools... hence, some exhaust shop might recommend u to get a slightly larger piping up front (between extractor till mid bullet) and slightly smaller one at the back (after bullet till muffler)... smaller piping accelerates the exhaust flow so it will exit ur muffler fast... this setup is generally ok.... as long as its not smaller up front and bigger rear end....

there wont be significant difference as long as ur fake one is working fine... what an air filter do is just to filter the air entering ur combustion chamber... it has no magic tricks up its sleeve...

its not the more the better... the key is to get the optimum flow and back pressure for best performance preference...

all i can say... 4-2-1 gives better mid-range torque... while 4-1 gives better horsepower at higher revs.... that is only the extractor configuration... piping diameter, primary and secondary piping length ratio, all takes into configuration in creating a suitable extractor for ur needs....

center bullet got round and oval shape mia maa... ask unker bring u go jianhang lepak more laa....

swirling bullet creates more backpressure.... possibly reduce less noise abit...

exhaust gas does not need to swirl out... it should exit in pulse manner so that it is able to help scavenge the following pulse....

satria gti with v6 engine??..

whole exhaust setting without the extractor is around that price...