Yeah most of these stock 1000-1.3 cars have very narrow pipes which were obviously designed for there own engines... But engines like g15 are not designed to run on old exhaust pipes.... I've literally seen people installing 1.25 inches dia closed reasonators, where exhaust wala claims sir jee awaz kum hojaegi meri gurantee and in the end this happens... No one considers back pressure or any concept of that bus andhaaa dhundh engine andar dala aur kaha Zang nai laga purana pipe theek hai jee.
When i was doing 1jz mark 2 people were suggesting me sir jee ek hi pipe daltay hain 6 cyl ko 1.7 inches ka jagah kum hai jee isle... So end user has to be careful about such things, nai to valve seals dalwatay rahain.
