honestly depending on your budget and what your power goals are you might be better off just buying a B16 or someting along those lines and just dropping it in.
my reasoning for that:
1)Its a HUGE jump up from stock
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its not all that hard to install
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you’ll have fun with it for a while
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more reliable then a who knows how many mile d15 turbo’d with scavenged parts
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once you do your first swap you MIGHT understand how cars work better and be more equiped to add on to the stock b series of your choice
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potential future gains… save up over winter and buy turbo parts for your new b series and have something worth bragging about when you can go out and beat V8’s all day long ( not starting shit your you v8 lovers im just saying stock ones for now)
EDIT: almost for got #7 d15= no vtec and we all kno vtec wins races!!!