ya la,,,when i read some articles from overseas website they said Blitz R-Fitz got problem with some type of car...maybe not so compatible...n difficult to tune...
i think R-FIT is better... u can see on the D1 result.. hehehe
but i think they r not all the same kua.. sure got some different n the PRICE also different.. but i more prefer blitz.. hehe
HKS F-CON SZ also not bad ma... can consider also:shades_smile: