[Propane Injection on a diesel]

propane fumigation system installed a few years back. Cost about £500. Has paid for itself many times over. Correctly set up will give +bhp and improved mpg.

Yes, it can 'wreck the engine'

Td5

[Defender td5 performance]

Am interested, too, in the 100mm intake.

Sounds as if you have a tubular exhaust manifold. If so, does it make much of a difference to power ?

My reading about plug-ins leads me to think they are not good.

More power for you = remove back exhaust box and go for propane fumigation. Can be significant bettering of acceleration and fuel consumption if used correctly. Can be significant engine damage if used incorrectly.

[Straight Pipe Instead Of Middle Silencer]

My experience is the same as that of 'eyore'. Taking out the middle box has given my Td5 a definate boost in torque.

Passed the NCT without a problem.

Modified 2001 Td5 with 90,000 miles on the clock.