Anyone tried the NA OBX headers?
 

Saw a set for sale and was wondering if anyone has these or has tried these. Any comments welcome. Also, anyone know approximately what gains are acheived with headers?

How Much Are ObX
 

I Wanted to buy OBX ALSO ARE THEY ANY GOOD .. I HAVE A AVERY SMALL BUDGET . .

a while ago i raised this question about these headers. from ebay right? i am going to get them, just my budget at the moment is tight. as i can remember, we compared them to the pacesetter ones for the NA supra. I personally like the OBX headers. they look really clean, the welds look really good and it looks like an overall good product.

Dang, I was hoping you would have gotten them by now. :bouncy: Their build quality seems really nice, they are what I would go with if I had an NA, Most definitely. http://www.toyota-supra.info/forums/...hlight=headers

I got a reply from one of the sellers. The outlet is 2.5". Soo... Would it be a waste if you had 3" behind that? Curious...

Pacesetter is a 2" outlet. OBX seems to be the better alternative.

Stick with 2 1/2 or 2 3/4 at the most if your planning to use nitrous. I just did a calculation based on engine size and the ideal piping size is slightly under 2.5. 183.07 is the 7M in cubic inches.

(RPM x Motor Size)/554,177 = Recommended diameter.

(7,000 x 183.07)/554,177 = 2.31"

With those #'s 2.25" is darn close. Have you seen headers with a 2.5" exit?

Yes, and I've seen 3" collectors too. I recommend you stick with 2.5" piping.

haha no, not yet. soon though, very soon. I decided to do a whole bunch of little things first. replaced all my vacuum hoses with the hose technique kit. made a custom intake, so now i dont have that ugly N/A intake piping. and I got my dvd player for the car that i have been saving for haha......

but the headers are my next thing. I am definetly getting the OBX headers. probably within the next month. Cant wait to get them!

Hey!
 

Nobody has said this yet: what is the gain with these headers...?

I know this is a broad range, but possibly 15-25 HP. Don't quote me though, this is just an educated guess.

Not bad!
 

15-25? Doesn't sound bad at all, I thought it'd be like 6-8... heh.

So who makes and sells these 2.5" and 3" headers?

They're for other applications, I wasn't specifically reffering to the 7M, although now that I look back, I should've :nuts: . To my knowledge only PaceSetter and OBX make a header for the 7M-GE.

I have an '89 n/a. I haven't put headers on it yet...because....the factory exhaust manifold has a double outlet, and the layout of the manifold is very open, and not restrictive. I think just slapping on headers will only get you about 5-7hp more, at most.

A cat back system will get you more gain for the $$$.

Ah.
 

Then not worth the $$ :P

What about CAI, headers, and catback? Wouldn't the whole set be more effective?

N/A's can't handle a whole bunch of fuel added, and it's already 9.2/1 compression ratio, so there's only so much you can do within a budget.

I've done the cat, straight through mufflers and pipes. Cold air intake, and some afm mods.

After much research, I feel like I said in my prior post, that the gain would be minimal. BUT...headers would be about my NEXT cheapest thing to do to gain a few more HPs.

I heard bad storys about OBX,

I've also heard bad stories about OBX, namely their turbo manifolds. But I've seen their (Honda) headers 1st hand and they are relatively well constructed.

EDIT: Besides that, as stated previously, I think there are only 2 off-the-shelf aftermarket headers for the 7M-GE. I would pick the OBX, hands down, no questions, and get it ceramic coated too.

headers would make a whole exhaust system flow better. im guessing about...15-25 hp from a whole good exhasut system. which is a lot (~10%) for the motor only being around 200 in the first place. but the car has a 17.5-1 power/weight ratio. so every 17 lbs you take off, you gain a HP. On my monte carlo i took a full 2nd off my 1/4 mile by taking out the back seat, carpet(floor is cheap rhino liner kinda stuff from home depot now), sound insulation and AC/heat box. it wouldnt be very smart to take all this stuff out of your daily driver, abut you can do other things like fiberglass hood/fenders and stuff like that if just want it to be faster, and maybe cheaper.