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1.8's a lot....... turbos.... do you have gas or diesel??
 

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Get a supercharger or a turbo diesle is always nice... saw a nice mkII turbo d the other day......
 

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on the intake idea ur paying for the name stamped on it ive built alot of cars mainly Mitsubishi but all that really matters is the filter. The project im on now is my first Volkswagen and im still learning myself but from personal experience i would waste my money on an intake unless u plan on doing an exhaust system.. all motors work mostly the same (with the exception of the rotary types)
but to build power u need to get as much air into that engine as possible but at the same time u have to get it all out or u build up to much back pressure so dont just go out on a whim and buy an intake .. thats what everybody does just run out and buy intakes cause u here so much bout them look into exhaust systems first thats just me. i have a 2005 gli stock pretty much. but im lookin at getting it chipped within the next 2 weeks after that it will NEED an intake and an Exhaust system but by all means start small and work ur way up if ur not real familar with these types of tuners do some research and see whats out there for it before u by one.... but to answer ur first question, from what i can see fom the way these cars are built and perfom the amount of power u can get and the things that can be done to them is only limited by how much ur willing to spend....
 

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your kind of right on your ideas on the intake and exhaust.

from what i've seen/done/heard. the stock exhaust on these cars are not very restrictive. In which case, adding a CAI or even replacing the stock box like I did to make a SRI will add a small boost to power. of course were not talking about a huge gain like u would get from a turbo. but then in this situation were not talking about spending 4k on a turbo set-up.

Starting small for MOST cars involves going to a CAI first. If you have a car that has a restrictive exhaust, for example the 1gn SOHC Neon, the first move would be exhaust work vs cai.

It's all dependant on the car.
 

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honestly i can't picture injectors making much of a difference. mayb if the ones you have are dirty/clogged. but imo injectors arent needed untill you move into the forced induction area
 
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