Extractors for GQ Diesel

I have a set of extractors for your 4x4 in Dry Creek here at the workshop...
$30... They came off my 96 before i put the turbo on..
They are in great cond..

Buy the extractors above. Simple as that

Gday Zach, Weve had them on our GQ diesel for 10yrs so I guess they can't be damaging anything.I havent driven the Patrol without them (they were on when we bought it) so I dont know if they improved performance.The mate we bought it off was going to turbocharge it but never got around to it.I know its hard to use the words 4.2 diesel and performance in the same sentence.lol.Apart from being a little on the slow side weve had a great run out of the old bus.(She's bulletproof)

IMHO after having had them, they do nothing - specially with the standard exhaust...

Some swear by them, but I think its more to justify their outlay of bucks. I swore at them. Should have gone the turbo (which I did in the end)

... but at the price Voxon is selling them, go for it.

There are negatives to consider, despite other's claims. That's not to say extractors are a bad thing though. It works like this: By fitting extractors you are allowing exhaust gases to leave the combustion chamber with less restriction, which equates to greater velocity, which in turn scavages the cylinders, ie "drags" more fresh air into the cylinder to start the process over again. Now, there is little point in doing this if all you are doing is jamming those same gases up in the very restrictive Nissan muffler. Therefore, you also have to consider a free-flow or turbo-type muffler and or larger diameter pipes to compliment the extractors. See how those $30 extractors have now turned into a $500 exhaust re-fit. Then, the full-flow muffler may sound a tad louder, which you may or may put up with, your choice. The reason some blokes say the extracs were a waste of time is because they thought they'd get them to work on the factory exhaust. Wrong. In a nutshell, the proper exhaust and muffler to compliment the extracs will liberate horsepower, it will lug better, rev out easier and return a slight improvment in fuel economy, when driven at the same speeds. Just don't expect it to compete with a turbo-charged engine.