HEHE what a noise!

Hello Theo.

T> beru poo, mine are NGK and are not over priced.

All other Beru may be, but not Silverstones. If indexed properly, they give a bit of increase in driveability at lower revs (up to about 2500) on 4-cylinder lumps and some others. Tested on VW engine codes RF, RP, ABD, ADZ, AGZ (5 cylinder), DG, DJ; Lada 1200, 1500, 1700 cc; UAZ 2300 cc; AUDI engine code ABC (6 cyl 2,3L IIRC); Eagle Talon 2L turbo; and Alfa 8v 2L twinspark. The only engine that hadn't been affected in any way was Mercedes 126 body with V8 4,3L. I can't explain that, but it definitely feels very pleasant to drive with Silverstones. And they are inexpensive (for example NGK B5ET here go for 103 rubles (about 3 Euros) a piece, Beru Silverstone S7 for 140 rubles (4 euros)).

No rolling road figures, sorry.

Sergey

... Things worth having are worth cheating for.