Hi David
We have sold 23 sets of these rod so far, i have used 6 sets in race engines so far and had no problems.
By the time you buy a set of 1275 rods have them straightened, close and honed, lightened,fit a set of arp rod bolts you nearly up to the price of a set of these and these will be a lot lighter than the s rods by a long way, ask Simon he uses them.
Graham Russell

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"It's better to be not informed than ill-informed"