please help! what header to buy and modify

you will need someone local to answer that, i know pa law not maryland.

in pa
newer cars only get obd2 testing, so if you have programming that by passes the secondary 02 sensor, so the light won't come on. you will pass the actual test. if they don't offer a chip tune. then you can fabricate a mil eliminator. to keep the cel off. most people put in dummy cats (or hollow out their stock ones) to pass the visual part of our test. (as long as it was not done by our shop, to hollow out a cat for someone is illegal)

for sniffer tests you need to be tuned well, depending on hat the states perimeters are for your car it should be able to pass without a cat. If it doesn't then you can retest. and some shops around here who still have their old sniffer equipment (the ones not hook directly to the states computer) will do a pretest and tune to get you into the range. other people i have heard of running denatured alcohol at a 10:1 ratio the tank before your test will make you pass. but i don't recommend it.

most of the cars we did aren't driven in winter. so they all qualify for the >5000 mile exemption. plus i think it is up to pre 84 now only needs to pass a gas cap test.. (that part keeps changing) and we didn't typically see a lot of typical people come back for maintenance. only the high end cars would come back for that.

I would say 2" piping would be the right choice for the stock engine. Talking to a few local performance shops, they recommended 2" from the cat back with a flowmaster 60 and keeping one resonator in. There was another member on here that removed both resonators when they did their exhaust and had to put them back in because it was way too loud.

if it was legal, i would straight pipe 8)

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Originally Posted by acdc1287

if it was legal, i would straight pipe 8)

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Some people may disagree but a straight-piped four banger is almost the worst sound you can get from a car.

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Originally Posted by 07_aveo

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Originally Posted by acdc1287

if it was legal, i would straight pipe 8)

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Some people may disagree but a straight-piped four banger is almost the worst sound you can get from a car.

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oh yeh, its horrid!

i got 2' repipe with megan duals, no resonators, punched out cat, and slightly modded headers, my **** loud as hell. if i dont have my silencers in for the winter, there would be no way id be able to allow my car to warm up in the driveway, it shakes the house and pisses off the neighbors.

is my setup (2.25 inch piping, highflow cat, muffler) going to be obnoxiously loud? should i tell them to keep one resonator in for good measure?

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Originally Posted by xdmitrix420

is my setup (2.25 inch piping, highflow cat, muffler) going to be obnoxiously loud? should i tell them to keep one resonator in for good measure?

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if u like ur exhaust loud, then no resonators, if u live in a residential area, and ur neighbors like u and u wanna keep it that way, keep a resonator in. get a good one tho that will match ur new exhaust pipe size like a vibrant resonator or a loudmouth.