Would a dyno tune and ECU Flash help?

I have currenly added a cosmo racing cold air intake, megan racing header with uppipe, and a catback exhaust kit. Although I can tell significant gains in top end speed, would paying the money for a dyno tune and ECU Flash make a noticeble difference? Currently Modified by KC offers a dyno tune and ecu flash for 350.. Worth it or not? Also is it going to kill my gas mileage?

You are more or less required to get a tune at this point, if not for other reasons then for the intake alone because otherwise the car will lean out. Also, an intake is generally not needed because the stock one is not restrictive in a significant way on the stock turbo. If you want, you can ditch it without losing power. I can tell you have not done the proper research and went about mods in a hotch-botch manner, no offense. Catback is another point where you more or less will not see significant gains from. The downpipe is the droid that you are looking for.

Also, dyno tune and ECU flash are pretty much the same thing, so you are not getting 2 things.

You also need to familiarize yourself with the concept of datalogging to ensure the tune is running good after you have it done.

You can prob get by with what you have but it would make more sense to pickup a downpipe and then hit that dyno tune deal. It's a decent price from what I've seen..

from stage 2 on the acessport 2 a pro tune i gained 40 tq and 20 hp.

any downpipe ideas for an automatic trans?

cobb

ERZ/CNT. Group buy still open. $280 delivered (catted) and pipes arrive in two weeks.

Any DP, catted or catless (you may have smell issues) should do it as long as you stick to known brands. eBay pipes are prone to issues and I wouldn't risk it.

+1 for a downpipe and then a tune.

how long is the group buy for the 5EAT catted downpipe going on for?

Maybe 1 more week. The pipes ship out the 27th. Insane pricing at $280 delivered for a catted DP. I can add you to the ist with no obligation. A secure link will be posted for ordering through subarugenerations website.