i just bought a 2000 1500 ext. cab 4x4..
the last owner reduced the exhaust from 2 3/4 to 2 1/2 just where the old muffler was they also put a dynomax turbo muffler on it... will this effect the performance of the motor? And how would i change the whole exhaust system from single to daul the most inexspencive way???

![Firing on 1 cylinder [L1] Firing on 1 cylinder [L1]](./images/ranks/sparkplugs/ranks_sparkplugs_1of8.gif)