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Originally Posted by Stealthcivic
Ok man, here is my logic and thank you for the words of wisdom...I don't really have experience with this (mods beside intakes, all I did is have an intake on my old civic..) so I am clueless about headers, exaust, etc...hondata...I just learn on 8th gen about hondata and k-pro (but still don't know what the hell k-pro is either  )
Yes, I do know my civic has a header  , I just don't know anything about it...but you have pointed out the header is part of the exaust,
My logic is that I want the car to remain close to stock , especially in exterior appearance, but I want more hp and torque mid-range. But, my question is isn't the stock header and stock exaust pretty good, I mean how much better flow will we get with aftermarket ? I thought the si was designed for performance. And, I thought the stock intake system is awesome
built into the fender wall, that is much better than any sri soaking up all the heat in the bay - and I live in a warm climate! But, if I do get I/H/E and reflash, I appreciate the quiet exaust you told me about. I also wouldn't have a clue about which header - you mentioned vibrant, 4-2 or 4-1? And, a regular header or race header ? I don't want my si too loud. I think it sounds awesome stock the way it is tuned. And, where I live there is no inspection, so I can get rid of my cat coverter, or get a high flow cat...which I am clueless about too bro , so thanks for the tips ..........  |
Seems you want to have your cake and eat it too
Sure the stock set up isn't bad but where is the fun in leaving it stock?
That's what the hobby of modding is all about. It's to really make the car your own according to your likes and dislikes. The options are endless and more stuff is getting released for our cars every day. (okay every few months or so
) If you don't have to worry about emissions or inspections then you have it made. Actually where I live we don't have to worry about such things either, yet.
Just imagine if you like the way your exhaust sounds now, how you will like the exhaust or your engine when it gets an even more agressive rumble to it. Don't get me wrong I am not one of those people that think louder is better, just the opposite but I like an exhaust that has a nice deep tone to it and an agressive roar then you hit it
There are a lot of cat back systems out there that will accomplish this task and still wont break windows and pi$$ off neighbors when you drive through your neighborhood.
I just don't know why you would want to put on a Race header if you are not willing to change your cat back. Sure you will eliminate the cat and it will get louder just by doing that but then it hits the bottleneck of your 2 inch cat back where you could gain a lot more ponies if you open that up to a 2.5 inch or at least a 60mm system (2.36inch).
The Vibrant Header and Cat Combo will be released soon and I will go with that combo once it hits the markt. It's a 4-2-1 design that comes with a Cat or a plain spacer pipe to connect to your cat back. The choice is yours. I rather keep it legal and keep a free flow cat in there which will also prevent throwing CEL's (Check engine lights). I already have the Vibrant Cat Back exhaust and it does should very sweet.
Close to stock in loudness at idle (just deeper), a nice rumble at normal speeds and a very agressive growl once you get on it. I highly recommend this exhaust. It has the looks, quality and sound I was looking for.
Now it's not the quietest exhaust out there but by far not the loudest either. Again if you want quiet you can go with the Greddy Sp2 or APEXIs WS 2 systems. They are the quietest cat backs on the market for the Si.
If you want to keep it close to stock and gain some ponies I would at least recommend a K&N drop in filter, perhaps a Random Technology Free Flowing Cat, a set of NST Pullies and at least the HFP Performance Muffler.
Those mods would probably would suit you best.
Here are the mods I have done to my car so far and some future mods coming up
What I did to my car so far: Injen Cold Air Intake, Vibrant Cat Back Exhaust, Silverstar bulbs, TWM Short Shifter, Base and Cable Bushings,
ZEX 75 shot Nitrous system, HFP Performance Lowering Springs,
Progress 22mm Rear Sway Bar, switched Manual transmission fluid to
Royal Purple Synchromax, switched to Royal Purple 5W30 Synthetic motor oil with Bosch Filter, 20% tint all around.
Future Mods:
NST Pulley set
Vibrant Race Header and Cat combo.
Zex Purge Valve and Bottle Heater
Koni FSD shocks and struts.