thats one thick ass spacer my one was only 5mm but yeh idle is alot smoother on mine to and alot more mid to high didnt you notice more punch down low i notice alot but my injector orings where bad and was leaking so i replaced them no more leaks and my spacer come with lil 5mm spacer washers for all the bolts and nuts take ur car for a drive and then touch the bolts u burn ur finger and them bolts push the heat in to the manifold
My Beast: 06 Polo GTI~White~Milltec CBE~APR V2 Tune~SuperPro Bushes~WhiteLine FSB~Phenolic Spacer
2nd Beast: 02 Audi S3~Stock
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