Porsche Brake Caliper Dust Boot Replacement Guide

Finding the Right Size

Porsche uses the same basic caliper design across many models, so the piston bore size, measured in millimeters, is what determines which kit fits. A caliper with two pistons per side will often use two different sizes, and some calipers use as many as four different sizes across the full assembly. The safest way to confirm fitment is to measure the pistons directly or cross-reference the Porsche part numbers below.

Dust Boot Only Replacement

If the pistons and seals are still in good shape and only the outer caps have cracked, a dust boot only kit is the simplest fix. We stock individual dust boots in the following sizes on one product listing, sold in pairs.

• 28mm, replaces Porsche part number 951 352 917 00 (951-352-917-00) (951.352.917.00)

• 30mm, replaces Porsche part number 951 352 917 01 (951-352-917-01) (951.352.917.01)

• 32mm, replaces Porsche part numbers 996 351 915 00 (996-351-915-00) (996.351.915.00) and 996 352 915 00 (996-352-915-00) (996.352.915.00)

• 36mm, replaces Porsche part number 951 351 917 00 (951-351-917-00) (951.351.917.00)

• 38mm, replaces Porsche part number 996 351 915 01 (996-351-915-01) (996.351.915.01)

• 40mm, replaces Porsche part number 951 351 917 01 (951-351-917-01) (951.351.917.01)

• 44mm, replaces Porsche part number 928 351 917 00 (928-351-917-00) (928.351.917.00)

Shop Caliper Dust Boots and choose the size you need at checkout.

Full Caliper Rebuild Kits

For a complete refresh, a rebuild kit includes both the dust boots and the pressure seals sized to match every piston in the caliper. These are the kits we carry, matched to the Porsche catalog part numbers we cross referenced.

• 27/29mm Caliper Rebuild Kit, replaces Porsche part number 958 351 313 00 (958-351-313-00) (958.351.313.00), fits the Panamera 971 platform

• 28/30mm Brembo Brake Caliper Rebuild Kit, replaces Porsche part number 955 352 915 00 (955-352-915-00) (955.352.915.00), fits Cayenne 957 rear calipers

• 30/30mm Brembo Caliper Rebuild Kit, replaces Porsche part number 955 352 915 10 (955-352-915-10) (955.352.915.10), fits Cayenne 957 rear calipers

• 30/30/30mm Brembo Brake Caliper Rebuild Kit, replaces Porsche part number 991 351 913 80 (991-351-913-80) (991.351.913.80), fits 911 R, GT3, GT3 RS (991) and Cayman GT4 (981) front calipers

• 30/34/38mm Brembo 18z Rebuild Kit, replaces Porsche part number 955 351 915 10 (955-351-915-10) (955.351.915.10), fits Cayenne 957 front calipers

• 32/32/32mm Brembo Caliper Rebuild Kit, replaces Porsche part number 991 351 915 00 (991-351-915-00) (991.351.915.00), fits 911 (991.2) and 911 Turbo, GT2 RS (991) front calipers

• 32/36/38mm Brembo Caliper Rebuild Kit, replaces Porsche part number 955 351 915 50 (955-351-915-50) (955.351.915.50), fits Cayenne 957 front calipers

• 34/34mm Brembo Caliper Rebuild Kit, replaces Porsche part number 965 352 917 00 (965-352-917-00) (965.352.917.00), fits rear calipers across 911 (991), 911 (997), 911 GT3, GT3 RS (997), 911 Turbo, GT2 (997), 911 Turbo, GT2 RS (991), Boxster (981), and Cayman (981)

• 34/36/38mm 17z Brembo Caliper Rebuild Kit, replaces Porsche part number 955 351 915 01 (955-351-915-01) (955.351.915.01), fits Cayenne 957 front calipers

• 36/36/36mm Brembo Caliper Rebuild Kit, replaces Porsche part number 955 351 915 20 (955-351-915-20) (955.351.915.20), fits Cayenne 957 and Panamera 970 front calipers

Not Sure Which Kit You Need

Send us your Porsche model, model year, and if possible the part number stamped on your old cap or seal, and we will confirm the correct kit before you order. Email us at info@ohioperformancesolutions.com and we will get back to you quickly.