I'm very pleased with a K&N filter in my V6 2.5.
Here are the mods I've done:
- K&N filter
- 7 holes drilled in the bottom of the air box
- non restrictive MIJ Exhaust ss line
- I've tested with & without the trumpet. Conclusion: do keep the trumpet & its Venturi effect. Taking off the trumpet does absolutely no good.
K&N with the holes filter does nothing to increase the mpg (maybe the contrary), but what a feast when kicking down! I feel a huge kick in the ass.
I've tested with K&N fitted before & after drilling the holes: it makes a massive & astounding difference. I'm now overtaking like a bullet!
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
- This vehicle was the 7,517th 75 to run off the production line, out of 112,381
- This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
- This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s