2.5 pistons
 

hi guys i am new here :) and wanted to ask if any cheap better pistons for a 2.5 block 05-07 .
i got an engine 2.5 block with 2.0 STI newage heads ,mdx321 turbo , pink injectors ,decat up-pipe,full miltek exhaust with sport cat and in 2 week going to be fitted to my wrx wagon bugeye .
will be fitted all engine loom and converted to STI avcs plus ECU remaped at about 350 360 bhp and very good torque. i can t wait to drive it :)))
as i read and know 2.5 pistons are not very strong and wanted to see any recommendation for a good set of 2.5 pistons with or without rings .
thank you ;)

Mahle
Woosner
Jp
Cosworth
Omega
Plus many more.............

Many many types that are all good when suited to correct application, some are noisier than others due to clearances.

Get in touch with any of the builders on here who should all be able to help you out.

Mahle are the best I have had in forged 2.5s
(My personal opinion and experience)

All the above are good for your power application

Just to add
I use Manley competition ( high compression ) in mine
But that's another story :)

what about CP pistons? any experience with some of them ?
can get them cheaper from USA ...
thank you

remember taxes from getting items from USA, Mahle is what I have can't knock them

Mahle get my vote and for the power/torque you are aiming for, the 4032 grade would do the job just right - nice and quiet from cold unlike the CP's which are often described as " a skeleton wank*ng in a biscuit tin " when cold.


Mick

Omega here :thumb: and their not noisy at all !!! :D honestly :norty:

2.0 heads will not work with a 2.5 block.

Correct Unless the OP is planning to have the heads machined to suite.



I run Mahle 2618 high compression pistons in mine. Now its got a good few thousand miles on it there is a bit of piston noise when cold but next to nothing when warm.

What makes you say that?

i havent looked into all the options but of what i have looked at Wiseco's from across the pond seems cheapest. if i forge mine thats probably what ill use as they have a good rep and have been around for ages over there, maybe lesser heard of over here though.

99.5mm
http://www.ebay.co.uk/itm/Subaru-EJ2...item3a66293dd7

100mm
http://www.ebay.co.uk/itm/Subaru-EJ2...item3cb8148266

both sold with no additional customs/import duty.

That's £320 PLUS import taxes of approx $144 (dollars) so we shall call it £80 for arguments sake so that's £400 which you can purchase pistons here for less or near enough same money imho (obviously brand specific), and that's if you don't still get hit with some kind of charge.

And Maz I won't forget the name of them after the head scratching that day you took me out :lol1: got there in the end tho :D that RB5 was fun :norty:

Lol, I still sometimes forget now ! Even though the rb5 has long gone my spec d has them fitted :D. :lol1:

no, its not.. look at the listings above shipping details.

"No additional import charges on delivery.
This item will be sent through the Global Postage Programme and includes international tracking."

I could be wrong but I don't see it like that?

Why list them with a price and then have the taxes underneath? Confusing if you ask me :lol1:

Best of luck anyway buddy

Nah no import tax. On eBay it will say you might get charged if its normal international shipping but sellers that use the international seller program or whatever it's called then you get listings like those two where theres that bit above the shipping price that tells you that you won't get hit with import duty. Trust me, I buy nearly everything on ebay lol

Yes they will, you just need to get the gaskets right for the correct CR. The smaller o.d. on the 2.0 heads do give a small step in the 'squish' area, but ive found that it makes little/no differnce. Ive tried them machined out as well.

Happy days then :)

I've bought from us before now and some have made it through easy enough and others get stuck in customs.

The ones I always found got stuck in customs were sent with the American postal service iirc which 99% time turned up with parcel force who just love to shaft you :lol1:

its hit or miss usually but if you see listings on ebay with that bit saying no additional import charges, etc. then they are using the international seller program or whatever it is and you wont be hit with import duty.

As wms said, had v4 heads on a 2.5 block, Great power delivery, pity it shat itself.