HM headers and Lukey exhaust?

[WytWun]

But I'm surprised now about the straight through muffler recommendation; so you're advocating that as being a much more significant mod over the headers with twice the performance gain?

Apart from the T join (instead of a proper Y join) between the banks in the AWD the exhaust system in the later 3rd gens was quite reasonable for a locally made family car, with the only difference between the "sports" badged (VRX, GTVi etc) cars and the others being the use of the straight through muffler (pretty much a Lukey LR-2779). Mitsubishi's published figures indicate the muffler would be worth 8kW (peak).

The info I have suggests that the HMs could be expected to show a gain of no more than about 4kW (peak - a little bit more than that is gained lower in the rev range).

[macropod]

The info I have suggests that the HMs could be expected to show a gain of no more than about 4kW (peak - a little bit more than that is gained lower in the rev range).

For some dyno charts, see: https://www.aussiemagna.com/forums/sh...=1#post1596077. On my TW VR-X AWD, the HM headers netted 9.6% more peak torque (20Nm) and 7.0% more peak power (7.4Kw) than stock. With HM headers, the output is more than the stock peak output all the way from 4400rmp to 5700rpm. At 5000rpm and lower, the HM headers consistently produce 8-10% more torque than stock.