i hope it does not have a computer or you just cost you a lot of money.
Just idea...
Cutting off your catalytic converter is nothing short of an absolutely stupid idea. Here's what a mechanic says:
"With your catalyst missing, your downstream lambda probe (Oxygen sensor) will feed your ECU wrong data, which will try to compensate your fuel trim. It will over fuel like mad. Too much fuel going into your cylinders, over a period of time, will cause engine damage, due to "bore wash". This is whereby excess fuel washes the vital oil lubrication from your cylinder bores, causing premature wear. Your engine will begin burning oil, resulting in high oil consumption, visible as blue smoke. Diluting petrol with oil will result in a very low octane, which couple with a hot operating environment, will cause detonation, which could lead to holes being blown into your piston crowns. Or worse, if severe enough, detonation occurring whilst your piston's on its compression stroke could bend a rod. This could cause a conrod and piston to smash through the side of your engine block."
And I haven't even started on the negative environmental affects and the respiratory problems it could cause. Loud engines attract cops, annoy neighbors, and make you seem like an all round douchebag. Just do yourself a favor and put it back on. Loud cars aren't cool; quiet cars with an unscratched paint job, a clean exterior and interior, and a good fuel economy are cool.
what car? is it old enough to not have any computer on it?
Already cut off the catalytic converter and welded on a straight pipe, got a custom air intake. What else?
