You won't lose horsepower due to blowby when you install a set Total Seal gapless piston rings. The secret is in Total Seal's gapless second ring technology. This arrangement uses an oversize cast-iron main ring, plus a chrome-faced secondary ring that overlaps the main ring's end gap. This interlocking design forms a gapless seal, which gives Total Seal rings a miniscule leakdown rate of just 2 percent or less, compared to the 8 to 10 percent rate for conventional gapped rings. Perfect for street or race applications. No special tools or modifications are required for the installation of Total Seal Rings.