2013-2017     F25     X3 xDrive28i

Thermal phenolic spacer to reduce heat transfer and minimize heat soak

55mm Exhaust   Hot Street  294° Intake / 273° Exhaust   10

Pro-Series stud bolts have a hexagon socket drive on the head side for screwing in the stud bolts

BMW S54 Block Sleeving Service C4352-070 2013-2017 F25 X3 xDrive28iBMW S54 Engine Block Sleeving Service: Are you aiming to increase your engine's power but concerned about cylinder cracking? Indeed, the S54's cylinder bores may be too thin to withstand substantial boost. However, with our robust iron sleeves, those worries become a thing of the past. You can achieve the power you desire with confidence in your engine's reliability. Why Choose Engine Block Sleeving: In reality, the factory cast iron material falls