^^^^+ 1000

All 4 runners in my Mirage's cracked at the welds....true that it took a while, like 2 years and a half. It turned purple the first half hour of use, the flex pipe broke in just 3 months...nothing else with the witness

 

i've been googling obx on the interweb and there seems to be alot of guys even porsche and lexus owners running them without problems. it might be worth a shot.

-sh$t is good

 

dont do it. i bought a set of obx long tube headers for my trans am and they were crap. fitment sucked.

 

first OBX items, werent the same quality as now!, by just looking at recent items you can see the difference

+ about the R&D that obx doent do (some guy said that here) WHAT R&D OBX doesnt need to do that, the just replicate/copy every good part anyone make. X company invest $3000 in R&D, finally came up with a header that warranty you Xwhp and sell it for $1000, obx buy one, copy it, and sell it for $300! DAMN Even if it only last 1 year before it auto destruct , i'll give it a shot, its 1/3 the price of the original part, and exactly the same (minus) quality maybe?

This Reminds me, when OBX start selling LSD, on HONDA-TECH , every one (without obx lsd) start flamming OBX's LSD, telling it wont last, saying it was crap, a lot of haters put OBX's name on the floor, But Guess what, not even one of those haters try the LSD's. Then A bunch of guys with Turbo Hondas, started to post videos, dyno charts, timeslips, of their 600-700-800 WHP, 11-12-13 sec , Hondas with OBX LSDs and none of them had anyproblems at those power levels!.

I just wish I still had my Ralliart to give it a shoot. Well really i dont wish I have RA, cause my actual car its way better, but you all get my point, If I still had my car I will definetly buy the OBX headers

 

I don't know, I'm not gonna risk it cause I'm not sure how long they'll hold up. I remember now someone else telling me about the welds going bad on their OBX twin loop muffler. Be convinced that you pay for quality anymore...

 

What would be the significant difference between these headers and the stock tube headers on the ralliart from the factory?

 

megan and obx both have the same or similar business model. I know Megan has lesser known smaller performance shops do design work for new products. Megay pays them up-front to buy the rights to the design, and reproduce it in mostly automated factories in China to let them make high volumes and cheap prices. They send the original designers samples and take advice on how to tweak lengths, bends, and welds til the developer agrees the quality is good. The original designers usually get exclusive distribution rights for the first year or 2 under their name, then it can be sold as OBX/Megan by their other dealers, and the original designer gets like a 10% royalty. I know this, because a friend of mine did the dev for Megan's EVO8 headers and some work for OBX on 911's.

That said, everyone knows the economic history of China. 20 years ago you could buy a Rolex knockoff and it'd be a piece of junk that wolud fall apart in a month. Today, you can buy a Rolex knockoff that's nicer and more reliable than a Rolex. The quality of the car parts has gotten better, too.

To answer gjgfrombigd's question:
Each cylinder exhausts hot gas to one of the header runs (one per cylinder, thus 4 header runs in a 4-cylinder engine). Those runs travel a distance, then all dump out into a small collector and join at the downpipe. Given that the cylinders fire at different times in the rotation, the exhaust pulses are staggered. So when the exhaust pulse from 1 cylinder gets t the collector, it causes turbulence and backpressure on the other cylinders when their exhaust valves are open and are trying to get rid of that heat. The shorter the run, the greater that pressure, thus the engine spends more of its momentum pushing gas out and retaining heat while giving up potential power. The longer runs give more room for that backpressure to be negated (pressure = force/area. more area, less pressure), and also cause suction in each run to pull the next pulse from that cylinder out faster (the opposite of back pressure). Getting the lengths JUST right to reduce back pressure enough to create a state of suction is tricky, which is why good header development is so highly values. This isn't true for turbocharged engines, because the turbo (which sits between the collector and downpipe) benefits in spool time and efficiency from that turbulence and kills any suction, anyway. Or something like that... I'm no mechanic, just a hobby engineer who reads lots of interwebs

 

I considered it enough to send the seller a question. no answer leads me to believe I'm better off with my original plans...

that's ebay for ya

 

I think that's about the best way it can be explained. Thank you.

 

he answered my question this afternoon. maybe he was busy for a couple days.

 

so... what did you ask and what was the reply?

 

Is not that they dont hold...that would be ignorant to say. They just rust after a given time, and can posibly crack, but thats in time...takes a wHILE.

Now about the flew pipe, its a good thing that they are steel, cuz u can just get it cut off and get another one, better one actually

 

If he could get more later on. he said maybe, in about as many words

 

well dont knock on the civic ppl cause there cars have been out long enough that they have cheep performance parts for there stuff and OBX is an ok company but ppl think there cheap cause there parts are cheep but i would go ahead and get it and if you dont like them dan ill get them from you .

 

Bought it. Its worth the gamble I suppose.

Do ya'll think a coating of high temp engine paint could help prevent any potential rust problems?