Just got a new '07 Si Sedan. I've been all about Subie for about 5 years. That's behind me now. Looking forward to the world of naturally aspirated, I have no clue. My questions are: What's the engine code on my i-vtec 2.0 liter (for example, WRX's is the EJ25)? I don't wanna add turbo power, but what do you suggest as simple add-ons for a few (5-15)more whp, while keeping costs to a minimum? With these suggestion, names of manufacturers? Thanks for your help.

 

I/H/E ...witch is headers inake and exhaust start with the simple bolt ons

 

your engine chasis code is k20A. Your generation code is FG

 

The engine code is actually k20z. Just a correction. And welcome to the forum

 

+1 with this.

KNN filters, DC headers, jasma certified mufflers. . .

 

your right. its the k20Z3 engine.

 

Thanks for the help and welcome. KNN on the way, can't find DC Headers for an '07 Civic Si (any suggestions welcome)(I googled and searched about 5 different suppliers websites), I now know what Jasma means (I assume they're also 50 state legal). Pokin around the intake, I discovered that the initial source of air goin in starts from just behind the bottom drivers side of radiator. Would that be Hondas version of cold air intake? Which is better: cold air or short ram? In doing that pokin around, I found the K20Z3 stamp. They don't make it easy to find. Thanks again for helpin. My goal is a quiet sleeper, with as close to stock appearance and sound as is possible, yet still turn a head or two as I pass up Altima SE R spec 5's and the like. Also: reflash ECU or piggyback?

 

Be careful with what you do. If you have any interest in keeping the factory warranty (which DOES matter to some folks) you should check into what you're allowed to do and what voids that ****.

I'll say, for what it's worth, that you seem to be on the right track with the quiet sleeper. I'm not as familiar with the newer Civs as I am the mid/late nineties, but I'm all for the quiet sleeper. These guys on here are an excellent resource and and great group of people to get a second opinion from.

Welcome and enjoy! Pics please!