Originally posted by Lance Kinley:
Unless the UIM has been extrude honed, the ports won't be 33/35mm. Only the SVT/ST200 UIM's are that big and they are pretty spendy at this point since most of them are gone.


They are most "definitely" NOT that large.

Even a Dual Honed UIM only specs at around 30.5mm / 31.8mm respectively.

Figure 1-2mm smaller each for a single honed (98/98.5 SVT) and 2-4mm smaller each for a regular UIM.

The returnless LIM he picked up specs at:

LIM (Returnless)
>Inlet
Primary: 33.5mm
Secondary: 34.7mm
>Outlet
Primary: 32.5mm
Secondary: 34mm

The main problem he will run into is that the non-SVT's DO NOT have Extrude Honed heads! That makes their head inlets ports a good 2mm smaller repectively then the 99/00 SVT which spec'd at 33mm/34mm.
(98/98.5 - only had secondary ports EH'd once)

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.