I have had several sleeves pinched and have worked just as good, if not better then a fully broken in new sleeve. I have several theories for this, the main one being that a seal has already been made with the P/S. So basically you are tightening a already perfect seal other then match a set from the get go. Plus you do not have to do the full break in procedure and can get some heavy heat cycling down in almost race conditions if it is a good pinch job, making for a very good sealed matched set. Like i said better then some sleeve sets i have done brand spanking new.

Some services are better then others, i have used a few different ones and rcrenew is by far the best and most consistant. perfect pinch, peak power and compression that tunes so easy it's ridiculous.