Atesilor 3.780" Piston Ring Compressor Tool for GM LS & LT Series 4.8L 5.3L Engines, 6061-T6 Billet Aluminum Tapered Ring Compressor, Fits LM7 L33 LC9 L83 L20 LR4 LY5 LMG

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Precision Fit for 3.780" Bores: Engineered specifically for GM 4.8L and 5.3L V8 engines. This fixed-diameter tapered tool ensures the most accurate compression for 3.780-inch bores, eliminating the guesswork and frustration of adjustable "one-size-fits-all" compressors Superior Ring Protection (Upgraded Design): Features a smooth, uniform inner taper that progressively compresses rings without snagging. Unlike conventional band-style tools, our design minimizes the risk of breaking fragile oil rings or scratching piston skirts during installation Built for Professionals & DIYers: CNC-machined from high-quality 6061-T6 Billet Aluminum. The black hard-anodized finish resists shop chemicals and wear, while the laser-etched markings ensure the size stays visible even after years of use in a greasy garage Wide Compatibility (Gen III, IV, V): One tool covers a massive range of LS and LT platforms. Perfect for rebuilding legendary engines like the LM7, L33, LC9, L83, L20, LR4, LY5, LMG, LH6, and more. Essential for truck enthusiasts and performance tuners Damage-Free Installation: The precision-honed interior surface eliminates tool marks that could catch a ring. By providing 360-degree even pressure, it allows the piston to slide into the cylinder block with a gentle tap, ensuring a perfect seal every time