420A 420a choice of performance parts

[bluespunk]

There are only three major parts to an NA exhaust, the header, the cat, and the catback.

you want something like (catback) this with a test pipe (short pipe that replaces the cat): 95-99 MITSUBISHI ECLIPSE RS GS 2.0L NON-TURBO N/A N1 CATBACK EXHAUST | eBay

I couldn't find a test pipe that wasn't a 3 inch one. I'd stick with a 2.5 exhaust over 3 inch while you're NA or you are likely to actually lose some bottom end power. 2.5 is fine for a low boost application too.

The only other exhaust part you could buy with an NA is a header. If you're going turbo later, you won't be able to keep it, so I'd skip it unless you find a super cheap one or don't mind taking a loss on it.

What you really need to do is decide how much power you want to make and pick a path to get there. Setting goals early helps you put your build together right without buying things you won't use or don't need.

Like others have suggested, the Jeep throttle body, or one from modern performance would be a good upgrade you can keep. An unorthodox underdrive pulley would be another. Both are popular mods in the 420a world and both are said to provide good results. After that, you'll be looking at things like cams and cam gears, which get a lot more espensive, but you can still keep them after a adding a turbo. I would save those for when you are ready to go to a ecu you can tune, like megasquirt. You'll get more out of them at that point.

A short ram air intake won't make a huge difference and you'll lose it when you turbo, but they are cheap. I think I paid like $25 for an ebay pipe and threw a aem filter on it that I had laying around from another car. If I had to do it again, I'd just look for some junkyard intercooler pipe and throw the filter on that. You can always put the filter on the turbo later, so it's not a big deal to spend the money on a good filter. I would stay away from the full cold air intakes though. Most aren't worth the money and you have to worry about sucking up water if you go through a large puddle.

Hope that helps, -Jake

 

[greengoblin2011]

I have the test pipe replacing my cat and an obx header with a cat back exhaust. I did it all at once and noticed a difference with throttle response and the car seemed more peppy. Don't know 100% which part made the bigger difference since I did it all once, but made a difference and wasn't real expensive.

 

[95eclispe]

There are only three major parts to an NA exhaust, the header, the cat, and the catback.

you want something like (catback) this with a test pipe (short pipe that replaces the cat): 95-99 MITSUBISHI ECLIPSE RS GS 2.0L NON-TURBO N/A N1 CATBACK EXHAUST | eBay

I couldn't find a test pipe that wasn't a 3 inch one. I'd stick with a 2.5 exhaust over 3 inch while you're NA or you are likely to actually lose some bottom end power. 2.5 is fine for a low boost application too.

The only other exhaust part you could buy with an NA is a header. If you're going turbo later, you won't be able to keep it, so I'd skip it unless you find a super cheap one or don't mind taking a loss on it.

What you really need to do is decide how much power you want to make and pick a path to get there. Setting goals early helps you put your build together right without buying things you won't use or don't need.

Like others have suggested, the Jeep throttle body, or one from modern performance would be a good upgrade you can keep. An unorthodox underdrive pulley would be another. Both are popular mods in the 420a world and both are said to provide good results. After that, you'll be looking at things like cams and cam gears, which get a lot more espensive, but you can still keep them after a adding a turbo. I would save those for when you are ready to go to a ecu you can tune, like megasquirt. You'll get more out of them at that point.

A short ram air intake won't make a huge difference and you'll lose it when you turbo, but they are cheap. I think I paid like $25 for an ebay pipe and threw a aem filter on it that I had laying around from another car. If I had to do it again, I'd just look for some junkyard intercooler pipe and throw the filter on that. You can always put the filter on the turbo later, so it's not a big deal to spend the money on a good filter. I would stay away from the full cold air intakes though. Most aren't worth the money and you have to worry about sucking up water if you go through a large puddle.

Hope that helps, -Jake

I pretty much upgraded everything you mentioned except throttle body and underdrive pulleys and my exhaust. my cam gears,headers intake are done already. i wanna get a ecu so i can start tuning it to get the most out of them.