I got the headers made from right at Liaquat Ali Khan chowk there was a exhaust person there who could make headers using your stock manifold's adapting point, I dont know about diameter i am pretty sure it was more than 2 inches, 6 into 1 style, I got them made for 16k, its really loud, the 6 cylinder I swear sounds like a v8 if your in low revs like below 3400 rpm above that the tradiontal 6 cylinder noise comes, yeah performance was changed, I lost the low end power alot, but now when I am above 4k rpm I feel a little more lets say a push from the engine that was not before the headers, I would recommend getting someone to flash your ecu to make use of headers personally I cant find anyone who will flash a 80 series land cruiser's ecu I talked to some people they told me get a motec m800 which is 4 lacs and I wont be getting that thats to tune the car.
