Injen or Downpipe

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03MSP

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2003.5 Mazdaspeed Protege
Ok, I hate myself for this already, but the search isn't working(for me at least) and I am sure this question has been asked before, but I'm just gonna put my question out there.

I finally have money saved for my first real mod. I am torn between an Injen CAI or one of the many downpipes out there.

From what I understand, I will get some kick ass sound from the Injen as well as a few more ponies; however I have hear that a downpipe offers great performance increase.

With the downpipe will there be any more turbo spooling sound than stock, or just a deeper note?

I heard the sound clips of the Injen and it was amazing, but I read that a downpipe will offer more hp.

If you were stock, which I'm sure some of you are, which would you pick?


P.S. please go easy on me ;)
 
I'd hands down go with a Short Ram Intake, and a 2.5" Downpipe with 1 high flow cat so you don't get a CEL. Emmissions will still be tough to pass, maybe not in Canada but in the US it should be tougher.
Who you buy from is your choice, or wait for more opinions.
 
Get the injen first, then save up some more and get the downpipe and cat back exhaust or a turbo back exhaust. Then up the boost a little. :)
 
Get the downpipe. More hp. As for the intake, before I had mine I just bought a cone filter. You take the stock box off throw the filter on and move the senser back. You will have to drill a small hole for the senser. Same sound almost.
 
Just picked up my Injen intake yesterday and installed it into the wee hours of the night. The install was easy. It looks and sounds so neat. Already turning heads. I noticed a small increase in power too. SaWeeet!!

Also, being able to hear the whistling of the air being pulled into the cone filter really clued me in about how the turbo spins up and down in relation to how I give it gas, and knowing this can really help me increase the life of my turbo.

I say the Injen CAI is a worthy investment, Thus far at least. Oh, and it comes with a neat licence plate frame.

P.S. I haven't even hit 900 on the odo yet. I love my TSP (TurkeySpeed Protege).
 
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Well, being the more moderate part of this board, I would say this...
Free up your exhaust and intake, and leave the rest for those who have more money than sense. When you start getting into major mods, you not only void your warranty, but you get to hear all the old crap..the other people who say "mazda sux", because they don't warranty the JOE MFC...MBC....whatever. "I want a down-pipe..how can Mazda be so down on me?" Well, here's a clue, dumbassas....YES, they will void your warranty for major mods. Should they do it? Anyrhing to do with engine itself..YES.
(my advice is this, and you can tell me to ****-off, that's okay)
Leave it stock and be okay about it. It's a great car, and you should be proud to own one. If you're looking to kill someone from the light, this may not be the car for you.

Sorry for the rant, but this s*** gets me a little too close to home. Ya'll have a good day!
 
get the intake for a SOUND and a downpipe for HP, whichever means more to you do first, personally i got the intake first cause i had no money to get both at the same time ....
 
stock intake isn't that much of a bottle as compared to the choke down and cats of the stock downpipe
 
intake will definitly affect the sound of ur car more than a downpipe, for that reason i went with injen, yes i know the reasoning is considered stupid from a lot of yall
 
Is the Injen guaranteed to bring out the turkey? Spending $200 on an intake vs $350+ on a DP would be nice if the HP gains are there, but I wouldn't want to spend another $100 on a problem created by a mod.
 
ive been debating the same thing for quite some time.. I just decided to do neither and get some motor mounts.. I was set on getting the apex DP, but I idecided that getting rid of both cats, and splicing into an O2 sensor wire, killing my warrenty, was not the best thing for me seeing as how my car is only half a year old.... but chances are, I'll be doing it this summer ha haha
 
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