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[Zinister]

A local mechanic told me these just came out within the last month. Anyone have any info?

[sportygordy]

What is the new part number? 

[jfh]

I haven't seen any new 4.00" pistons in the SE catalog or on the MoCo website.

[BADBAGG]

I have them installed in my bike.
22502-07
kit,pist,110 h/c forged,std
fits 07 + later twin cam models equipped with 4" bore cyclinders.

[BADBAGG]

here is the box.........

[Gone Fishin']

With a part number ending in -07, it is safe to say that this is not really a new item.

Does anyone have results in what these improve over stock?

Ride safely,
Louis

[HD Street Performance]

They are a very nice Wiseco piston
11/1 compression, not what works well on many street motors

[Unbalanced]

here is the box.........

http://www.hmhd.com/webstore/viewiteminfo.asp?sku=22502-07

Bump torque and horsepower on your 110" Twin Cam powertrain with the addition of high compression pistons. Developed for the 110" Race Kit, these pistons increase compression to 10.5:1. Forged from high strength aluminum, the pistons are precision machined and feature coated skirts for a tight tolerance fit and quieter operation. All EFI models require ECM calibration (priced separately.) For Race Application only.
 
Fits 07-later Twin Cam models equipped with 4" Big Bore Cyliners.

I was told these are Mahle Pistons not Wiseco.

[sadunbar]

http://www.hmhd.com/webstore/viewiteminfo.asp?sku=22502-07

Bump torque and horsepower on your 110" Twin Cam powertrain with the addition of high compression pistons. Developed for the 110" Race Kit, these pistons increase compression to 10.5:1. Forged from high strength aluminum, the pistons are precision machined and feature coated skirts for a tight tolerance fit and quieter operation. All EFI models require ECM calibration (priced separately.) For Race Application only.
 
Fits 07-later Twin Cam models equipped with 4" Big Bore Cyliners.

I was told these are Mahle Pistons not Wiseco.

So was I...  I wonder what they actually are - since I was told this by a MOCO parts counter person - not widely known to be a reliable source of information...

[johnsachs]

Just checking an invoice I have for 3 sets of # 22502-07,dated 9-16-09,and I can assure you that the sets I got were MAHLE coated,+11 cc dome pistons.
John

[sadunbar]

Just checking an invoice I have for 3 sets of # 22502-07,dated 9-16-09,and I can assure you that the sets I got were MAHLE coated,+11 cc dome pistons.
John

thanks John....   

[Unbalanced]

Scott,

Just got home I guess guess I don't need to post now that John said mine where Mahle's.   Ya got it from the horses mouth so to speak already.  Mine were bought 2 years ago so they aren't new to the market.  

[HD Street Performance]

Sorry for the mix up guys I was confusing these with the 113" HC pistons for the ACR head package.

[Zinister]

Do you like the piston swap over having the heads machined down for the bump in compression?


What kind of gains did you see?

[StreetDog]

 I have these pistons in mine and I now get the occasionally sparknock that I never got before. I am careful of what name brand of gas I use but still get it at slower speeds. Maybe there is an adjustment I need to do.