Yeah it's the s*** toyota gearbox. I really wish I'd used something better now. At the time, the internet was rife with people posting their opinions that "rah they're good for 500HP" etc. Maybe they are when behind s*** 4 cylinders or something that produce basically no torque... but my mate shredded the same type of gearbox behind his 5 litre Holden V8 with not much over 300HP, and he wasn't even abusing it, just accelerating in 3rd with slicks!
Anyway, I imagine it's going to die a hideous death at some stage.
The exhaust runners are pretty damn close to equal... I'd say I've kept any error to within 10mm difference.
I took ages making the extractors. It was such a s*** job I kept losing motivation and putting it off... ended up taking a year to get them done, using only a handheld 4" disc grinder & a round file. Basically I routed the first & longest runner leaving as much clearance as possible for the others, then made the others to fit, but also made sure I was using enough pieces to get the required lengths. (That's where the whiteboard came in handy!)
Many hours were spent lying under the car visualising the required routing to get the necessary lengths.
I am not keen to ever make another set of extractors, from now on everything is going to be turbocharged to make it simpler.
