4.4 Factory Race Series External Bypass Piggyback Shock
FOX External Bypass shocks have racked up countless wins across the globe over the past 30 years. There’s no questioning whether they’re race proven, but in the words of Bob Fox, “we’re never done.” In that spirit, we’ve revitalized our tried-and-true externally adjustable position sensitive damping archtecture to deliver all-new standards of performance and durability, all while streamlining the production process.
PRODUCT OPTIONS
16 — Enquire
18” — Enquire
NEW FEATURES
BODY FINISH: Dual coated body with proprietary FOX Grey Cerakote® protective ceramic coating over zinc plated basecoat for improved corrosion resistance and durability
ADJUSTERS: All-new Gen 3 clicker adjuster for 1" bypass tubes provides 25% increased adjustment range over previous generation and utilizes less parts for improved durability and serviceability. Black anodized adjuster housings feature color coded seals for compression, rebound, and gold valves.
RESERVOIR CLAMP: Black anodized billet aluminum reservoir clamp
PART NUMBERS: New structure denotes diameter in middle two digits
-L (LEFT), -R (RIGHT) and -C (CUSTOM) variation suffixes
CARRYOVER FEATURES
COMPONENTS: Black anodized, CNC machined 6061-T6 billet aluminum
BODY: Smooth bore and honed seamless steel
BODY CAP: Rotating body cap design allows precise clocking and fitment
BEARING: Wire ring bearing design
SHAFT: 1-1/4" hard chrome plated 17-4 H900 stainless steel shafts
PISTON: 4140 hardened steel 9-port high-flow piston
VALVING: Tunable, velocity sensitive deburred valve shims
SEALS: High-temp Viton® redundant sealing pack system with main seal, wiper seal and scraper seal
OIL: JM92 Advanced Suspension Fluid for superior race proven performance from 0-400° F
HEIMS: PFTE-lined, heat-treated steel spherical bearings
ADJUSTMENTS: Piston Valving - Compression, Rebound
External Bypass adjusters - Compression, Rebound
STANDARD CONFIGURATIONS
TRAVEL: 16", 18"
RESERVOIR: Piggyback
TUBE SIZE: 1"
BYPASS LAYOUTS: 5 Tube (3 compression, 2 rebound)
EYELET LENGTH: 2.05"
MOUNTING: 5/8" x 1-1/2"
ORIENTATION: Left (-L) and Right (-R) specific part numbers
CUSTOM OPTIONS
VALVING: Custom valving specs
RESERVOIRS: Remote
BYPASS LAYOUTS: Custom tube layouts
ECS2: External Cooling System 2 - race proven to reduce fluid temps by up to 150° F
ADJUSTERS: Gold Valve (free bleed), QAB (Quick Adjust Bypass)
EYELETS: Multiple eyelet mounting lengths
MOUNTING:1-1/2" mounting width spacers/reducers
PART NUMBERS: For custom configurations, replace "-L"or "-R" suffix in standard part numbers with "-C"
FOX External Bypass shocks have racked up countless wins across the globe over the past 30 years. There’s no questioning whether they’re race proven, but in the words of Bob Fox, “we’re never done.” In that spirit, we’ve revitalized our tried-and-true externally adjustable position sensitive damping archtecture to deliver all-new standards of performance and durability, all while streamlining the production process.
PRODUCT OPTIONS
16 — Enquire
18” — Enquire
NEW FEATURES
BODY FINISH: Dual coated body with proprietary FOX Grey Cerakote® protective ceramic coating over zinc plated basecoat for improved corrosion resistance and durability
ADJUSTERS: All-new Gen 3 clicker adjuster for 1" bypass tubes provides 25% increased adjustment range over previous generation and utilizes less parts for improved durability and serviceability. Black anodized adjuster housings feature color coded seals for compression, rebound, and gold valves.
RESERVOIR CLAMP: Black anodized billet aluminum reservoir clamp
PART NUMBERS: New structure denotes diameter in middle two digits
-L (LEFT), -R (RIGHT) and -C (CUSTOM) variation suffixes
CARRYOVER FEATURES
COMPONENTS: Black anodized, CNC machined 6061-T6 billet aluminum
BODY: Smooth bore and honed seamless steel
BODY CAP: Rotating body cap design allows precise clocking and fitment
BEARING: Wire ring bearing design
SHAFT: 1-1/4" hard chrome plated 17-4 H900 stainless steel shafts
PISTON: 4140 hardened steel 9-port high-flow piston
VALVING: Tunable, velocity sensitive deburred valve shims
SEALS: High-temp Viton® redundant sealing pack system with main seal, wiper seal and scraper seal
OIL: JM92 Advanced Suspension Fluid for superior race proven performance from 0-400° F
HEIMS: PFTE-lined, heat-treated steel spherical bearings
ADJUSTMENTS: Piston Valving - Compression, Rebound
External Bypass adjusters - Compression, Rebound
STANDARD CONFIGURATIONS
TRAVEL: 16", 18"
RESERVOIR: Piggyback
TUBE SIZE: 1"
BYPASS LAYOUTS: 5 Tube (3 compression, 2 rebound)
EYELET LENGTH: 2.05"
MOUNTING: 5/8" x 1-1/2"
ORIENTATION: Left (-L) and Right (-R) specific part numbers
CUSTOM OPTIONS
VALVING: Custom valving specs
RESERVOIRS: Remote
BYPASS LAYOUTS: Custom tube layouts
ECS2: External Cooling System 2 - race proven to reduce fluid temps by up to 150° F
ADJUSTERS: Gold Valve (free bleed), QAB (Quick Adjust Bypass)
EYELETS: Multiple eyelet mounting lengths
MOUNTING:1-1/2" mounting width spacers/reducers
PART NUMBERS: For custom configurations, replace "-L"or "-R" suffix in standard part numbers with "-C"
FOX External Bypass shocks have racked up countless wins across the globe over the past 30 years. There’s no questioning whether they’re race proven, but in the words of Bob Fox, “we’re never done.” In that spirit, we’ve revitalized our tried-and-true externally adjustable position sensitive damping archtecture to deliver all-new standards of performance and durability, all while streamlining the production process.
PRODUCT OPTIONS
16 — Enquire
18” — Enquire
NEW FEATURES
BODY FINISH: Dual coated body with proprietary FOX Grey Cerakote® protective ceramic coating over zinc plated basecoat for improved corrosion resistance and durability
ADJUSTERS: All-new Gen 3 clicker adjuster for 1" bypass tubes provides 25% increased adjustment range over previous generation and utilizes less parts for improved durability and serviceability. Black anodized adjuster housings feature color coded seals for compression, rebound, and gold valves.
RESERVOIR CLAMP: Black anodized billet aluminum reservoir clamp
PART NUMBERS: New structure denotes diameter in middle two digits
-L (LEFT), -R (RIGHT) and -C (CUSTOM) variation suffixes
CARRYOVER FEATURES
COMPONENTS: Black anodized, CNC machined 6061-T6 billet aluminum
BODY: Smooth bore and honed seamless steel
BODY CAP: Rotating body cap design allows precise clocking and fitment
BEARING: Wire ring bearing design
SHAFT: 1-1/4" hard chrome plated 17-4 H900 stainless steel shafts
PISTON: 4140 hardened steel 9-port high-flow piston
VALVING: Tunable, velocity sensitive deburred valve shims
SEALS: High-temp Viton® redundant sealing pack system with main seal, wiper seal and scraper seal
OIL: JM92 Advanced Suspension Fluid for superior race proven performance from 0-400° F
HEIMS: PFTE-lined, heat-treated steel spherical bearings
ADJUSTMENTS: Piston Valving - Compression, Rebound
External Bypass adjusters - Compression, Rebound
STANDARD CONFIGURATIONS
TRAVEL: 16", 18"
RESERVOIR: Piggyback
TUBE SIZE: 1"
BYPASS LAYOUTS: 5 Tube (3 compression, 2 rebound)
EYELET LENGTH: 2.05"
MOUNTING: 5/8" x 1-1/2"
ORIENTATION: Left (-L) and Right (-R) specific part numbers
CUSTOM OPTIONS
VALVING: Custom valving specs
RESERVOIRS: Remote
BYPASS LAYOUTS: Custom tube layouts
ECS2: External Cooling System 2 - race proven to reduce fluid temps by up to 150° F
ADJUSTERS: Gold Valve (free bleed), QAB (Quick Adjust Bypass)
EYELETS: Multiple eyelet mounting lengths
MOUNTING:1-1/2" mounting width spacers/reducers
PART NUMBERS: For custom configurations, replace "-L"or "-R" suffix in standard part numbers with "-C"