Which headers for 2.4
Not a Sebring
Joined: 02-22-07
Posts: 12,863
Likes: 2
From: Northern VA
The 1.5" primaries and 2.5" DP are better suited for our car. Running anything much bigger w/o forced induction and you'll just lose compression and not really gain any hp. If both ZZP and CA both reccomend the 2.5" DP for the 2.4 for a reason. Biggest IS NOT always better. Take it from me......I used to have an '88 RX-7 convertible non-turbo. I had an Apex-i GT Spec 3" cat-back on it which was way overkill. Only reason it was on there was b/c I got it brand new for $340 b/c a website messed an order up badly for me and offered to let me have it for super cheap for my troubles, compared to its $560 retail. Sure, it was crazy ass loud (also had a Racing Beat header) and looked badass, but I probally made no real power with it.
The header's primaries won't really make a huge diff, just make sure the header dosent have like a 3" collector unless you plan on adding boost via a supercharger. (Turbocharger will require you to replace the header alltogether w/ turbo manifold). But a 3" downpipe (even with a 2.5" exit flange) is certainly overkill for our cars. My roomate and my friend Eric have a 301whp STI and a 402whp WRX (20G turbo upgrade on the WRX) and both use an Agency Power 3" downpipe.......so I know 3" is way too much for our cars considering their cars run a 3".
The header's primaries won't really make a huge diff, just make sure the header dosent have like a 3" collector unless you plan on adding boost via a supercharger. (Turbocharger will require you to replace the header alltogether w/ turbo manifold). But a 3" downpipe (even with a 2.5" exit flange) is certainly overkill for our cars. My roomate and my friend Eric have a 301whp STI and a 402whp WRX (20G turbo upgrade on the WRX) and both use an Agency Power 3" downpipe.......so I know 3" is way too much for our cars considering their cars run a 3".
New Member
Joined: 08-26-07
Posts: 78
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From: levittown, pa
my zzp header and d/p is starting to break in...sounds sweet...havent full thottle yet..but my engine had came on 2day...any idea why it came on?...i know it randomly comes on in my car...but havent came on since winter was over?
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Joined: 03-17-06
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From: Moncton Newbrunswick Can.
Not a Sebring
Joined: 02-22-07
Posts: 12,863
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From: Northern VA
Not a Sebring
Joined: 02-22-07
Posts: 12,863
Likes: 2
From: Northern VA
Senior Member
Joined: 11-22-06
Posts: 1,505
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From: Orlando, FL
Senior Member
Joined: 05-21-06
Posts: 5,577
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From: Gainesville, FL
CA is the best buy for they money. Plus, its the only header thats really been dyoned on a 2.4. 8whp increase over stock on the CA website.
But the new ZZP midlength header looks sick!
Also, OBX-R makes a sick looking new header for our cars.....havent really heard anything about it much on the forums yet though. OBX-R is hit or miss though......however, I will say that they've turned their act around a good bit and make much more quality parts now than they used to.
Yeah, I have a full exhaust w/ no cat and it sounds angry as hell when im coming down in the RPMs to a stop. You hear me coming for miles, lol.
But the new ZZP midlength header looks sick!
Also, OBX-R makes a sick looking new header for our cars.....havent really heard anything about it much on the forums yet though. OBX-R is hit or miss though......however, I will say that they've turned their act around a good bit and make much more quality parts now than they used to.
Yeah, I have a full exhaust w/ no cat and it sounds angry as hell when im coming down in the RPMs to a stop. You hear me coming for miles, lol.
i've been looking at the obx one as well. at this point i'm still leaning twords the CA part, but the obx looks to have nice thick metal to it.
i'm assuming you got the header DP combo? we really need to get a GB for that here... so many people have bought it it's not funny... and seriously if i could get it for 450 with 1 3/4 primarys and a 3" 2.5 bolt on DP with the 304 stainless i would be giddy as a school girl 
umm ok i just checked their site and this guy is apparently a school girl ... the combo is now 459 with 1 3/4 inch primaries and a 3" DP of 304 steel... so i retracted my earlier statement to say... if i can get it for 400 i'll be giddy as a school girl haha
nm i'm a double idiot i missed the buttong when i said with cat....
nm i'm a double idiot i missed the buttong when i said with cat....
New Member
Joined: 08-26-07
Posts: 78
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From: levittown, pa
Zzp Header?dp W Cat Problem!!!
i got my zzp header and downpipe install last thursday...and now my engine is coming on...when i past 4rpm it makes this electricty sound...sounds bad...kinda sound like a ricer car cause of it...I called the place where i got it done and they said that the catalyic converter is to small for the d/p i believe and he said that i might need an o2 sensor replaced...so anybody know zzp email address or can any1 help me out on this...they told me to call where i got it from...and i,m stopping by on tuesday moring cause they want to look AT IT. other than that this combo `is great love the sound and it roaars ....besides when i passed the 4rpms it sounds like **** sumtimes....
* i mean engine light
* i mean engine light
Last edited by Cobalt2.4ss/sc; Aug 30, 2007 at 05:39 PM. Reason: Automerged Doublepost
Thread Starter
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Joined: 04-18-06
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From: Atlanta
customerservice@zzperformance.com Thats the address they used for me when my order was placed and sent.