yes. more loud than sflow.
there is slight different between sflow n straight flow. like u noe, sflow gives u more power on low or mid hp, mean while straight is d other way. if u change from sflow to vice versa, u can feel there is different although not much.
if goin for halfcut, better make sure its japang mali, wit jasma tag (ribet on d muffler).
kanasai lu... u kasi besar itu piping of course la... generally, for most car straight flow muffler pair best wit stock piping..
if u wan cheap n cheerful, kweng shop is d way to go..
topcat/matola etc hav better inner side quality.. generally, muffler in malaysia r universal.. MOST r 2" inlet...... so vry difficult to find smaller size..
well... it all depends on which school of tuning u r at. some school tune for most little resistance to exhaust flow, some tune for best sound wave pressure, n alot more schools..
generally, people will tune for little resistance to exhaust flow.. when u r this type of school, then using 2" muffler is better choice.
generally, resistance for straight flow muffler; -100cfm or below, resistance for sflow muffler; - cfm for inner diameter divide by 2. this is rough estimation based on more well known muffler..
cfm for different piping is here..
http://www.exhaustvideos.com/faq/how-to-ca...-pipe-diameter/u r r lookin for performance or jus wanna ganti it n hope abit performance gain?
i dont hope for high performance since its an old car. maybe just want to ganti and get some performance a bit