Vehicle & Technical > Discovery

Straight through exhaust

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Patty:
Looking at doing a straight through on my 300tdi was wondering if to remove just the rear and centre boxes or geting rid of the whole lot including the catalytic converter aswel and wondering how wasy it is to do myself?

wheels244:
Got a straight through on mine.

I bought a stainless decat pipe, stainless centre pipe that replaces the centre box and then took the exhaust out of the side, so no silencers at all.

I fitted a K & N at the same time - the combination made a big difference, the turbo spins ups faster and makes it much more driveable - not as many gear changes.

It does sound a bit more agricultural but definately not too loud.

Disco Matt:
How easy it is to do will depend on how rusty the old bolts are - as you'd be replacing the whole thing this shouldn't be as much of a problem!

Does anyone make a straight through exhaust kit? Just thinking that the complex bends that take the exhaust up and over the back axle would be quite tricky to get right if you bought various pipe bends. It might be better if you can keep that part of the original exhaust and weld in a new tailpipe.

You could also fit a side exit at the same time - I would like to do this but it would mean hacking a stainless exhaust, which I don't want to do!

Range Rover Blues:
fit a de-cat front pipe and a sport utility system, it will have the rear boc but it makes very little difference to performance, if anything i think a straight through system will make things worse, all that noise comes from your engine after all.

J.D.:
Also bear in mind that with all the boxes removed, you will have pretty much no back pressure, which doesn't do the engine any good at all.

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