When installing new piston rings remember to always check the end ring gap clearances according to manufacturer specs (a good rule of thumb for piston to wall clearances in Tegs is for every inch of cylinder bore use 0.0040-0.0043 in. ring end gap) and to lubricate with WD40 prior to installation to achieve a faster break-in rather allowing for the engine oil to wash down in between the ring-wall gap early on. For piston to wall clearances, if the pistons are of a low silicon alloy, use .003", but do not run less clearance. If the pistons are made from a high silicon content alloy, run them at 0.0026" to 0.0028", depending on the bore and application (N/A vs. FI). In race-only N/A engines, some people have gone as low as 0.0018-0.0022" with forged medium silicon pistons. However, these are not your 50,000-100,000 mile specials in terms of engines for obvious wear reasons.