Would that be to big of exhaust for my car?? mods are in the sig. I know that is kinda big but i found a deal on dual 3inch exhaust.

 

If you want to slowly whittle away at the metal by scraping on stuff go for it, they sound great but they also have a "drone zone" as I like to call it, around 2500-3500 rpm, you would really have it bad with that 306 cam and the stall. I bought some jet-hot long tubes for my last Z and I couldnt get a y-pipe to fit so went and got the true duals ran, I scraped on everything. Oh and you cant ride with 4 people in the car anymore. Get 2 1/2 inch pipes, its just a 350.

 

3" would be overkill for your setup.

 

would 3inch hurt anything? I know it wouldnt be ideal but i can get a good deal on it. Or is 3inch to little back pressure?

 

Buy 2.5" setup. I got everything you need. LOL

 

It won't hurt anything, the car just most likely wont feel as quick as it would with 2.5. if you can get a good deal go for it.

 

hurt the low end and same top end. something else to look at is the ground clearance.