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Does anyone have experience of using a so called performance air filter on an aero or other quicky. I used K&N's and pipercross in my junior go faster days when I had a mk1 Mexico. Elk parts sell them and I was wondering what they do performance wise and whether that would effect premiums if you told Insurers about them as strictly speaking you must tell them about all mods!
 

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I have a JR full flow filter fitted to my 2.3 turbo and I've never noticed a blind bit of difference. I daresay there may be another 3 or 4 horses liberated but that is a very small percentage of 200. On it's own it won't do much for the power but combined with a chipped engine and a more freeflow exhaust it should help.
The main benefit for me is that I won't have to buy another air filter as long as I kep the car.
 

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As usuasl I may be talking rubbish but I would not bother fitting just a performance air filter as I also don't think you will see a difference.
The standard air filter seems huge to me, and 2 or 3 times the size of other 2 litre cars I have owned.
I also had a go faster K & N on my escort RS2000 because all the magazines said I had to and to be honest the only difference i noticed was that it iced up on motor ways.

If you want to go racing and have fitted large exhaust (again the standard one os huge compared to other cars) etc etc you might see the difference if not i would save your pennies.
Then again i might be wrong.
 

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I agree with you 'JFP', I can't see you would notice any difference with fitting a performance filter to an Aero. I certainley have'nt bothered. Yes, in the old days (!) a K&N or Pipercross etc., on a side draught or even downdraught carb equipped engine produced an improvement in performance (at an increase in induction noise) provided that said carb(s) were rejetted for the increased airflow. The Aero is a forced induction engine with a fairly torturous intake path, so any improvement would be negliable at road speeds. Obviously in a competition inviroment, when a few bhp at max revs is important then it would be a neccessary fitment. Better to spend money in a more important area such as reducing intake charged air temperature with the fitting of a more efficient and high flow intercooler. Engines love cold air......!
 
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