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Up to 15% offVendor:GSC Power DivisionGSC P-D Toyota 2JZ Viton 6mm Valve Seal Kit Set of 12
Regular price $14.05Sale price $14.05 Regular priceUnit price per$16.53You Save $2.48! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Subaru EJ Series Viton 6mm Valve Stem Seal - Set of 500
Only 6 leftRegular price $304.84Sale price $304.84 Regular priceUnit price per$358.63You Save $53.79! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Ford Mustang 5.0L Gen 3 Coyote Valve Stem Seal w/Integrated Spring Seat - Set of 32
Only 17 leftRegular price $66.35Sale price $66.35 Regular priceUnit price per$78.06You Save $11.71! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Ford Mustang 5.0L Coyote Valve Stem Seal w/Integrated Spring Seat - Set of 32
Only 2 leftRegular price $61.46Sale price $61.46 Regular priceUnit price per$72.31You Save $10.85! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Toyota Supra/BMW B58/N54/S55/S58 Viton Intake Valve Stem Seals - Set of 12
Regular price $28.26Sale price $28.26 Regular priceUnit price per$33.25You Save $4.99! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Toyota Supra/BMW B58/N54/S55/S58 Viton Exhaust Valve Stem Seals - Set of 12
Regular price $28.26Sale price $28.26 Regular priceUnit price per$33.25You Save $4.99! -
Up to 15% offVendor:GSC Power DivisionGSC P-D 2023+ Nissan 400Z VR30DDTT Valve Stem Seal - Set of 24
Only 8 leftRegular price $28.72Sale price $28.72 Regular priceUnit price per$33.79You Save $5.07! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Nissan TB48DE Valve Stem Viton 7mm Seal - SET OF 24
Regular price $31.51Sale price $31.51 Regular priceUnit price per$37.07You Save $5.56! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Honda B/K/H Series Viton 5.5mm Valve Stem Seal - Set of 16
Regular price $17.75Sale price $17.75 Regular priceUnit price per$20.88You Save $3.13! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Honda B/K/H Viton 6mm Exhaust Valve Stem Seal Set
Only 9 leftRegular price $10.62Sale price $10.62 Regular priceUnit price per$12.49You Save $1.87! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Honda B/K/H Series Viton 5.5mm Valve Stem Seal - Set of 8
Only 11 leftRegular price $10.70Sale price $10.70 Regular priceUnit price per$12.59You Save $1.89! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Toyota GR Corolla/GR Yaris G16E-GTS Viton 5.5mm Valve Stem Seal Set - Set of 12
Only 8 leftRegular price $14.25Sale price $14.25 Regular priceUnit price per$16.77You Save $2.52! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Subaru FA20 Viton 6mm Valve Stem Seal Set
Regular price $20.48Sale price $20.48 Regular priceUnit price per$24.09You Save $3.61! -
Up to 15% offVendor:GSC Power DivisionGSC P-D Subaru EJ257/EJ207/EJ205 Viton 6mm Valve Stem Seal Set
Regular price $17.52Sale price $17.52 Regular priceUnit price per$20.61You Save $3.09!
Why Buy from FAST of West Chester?
This isn’t a warehouse — it’s a performance shop. At FAST of West Chester, every part we sell has been installed, tested, and pushed on real builds.
Led by Dave Brown, our team knows what works, what doesn’t, and what actually delivers results. No guesswork. No wasted money. Just proven performance.
Unlike large online retailers, our recommendations are based on hands-on experience with Subaru, JDM, and performance platforms — ensuring every part we offer delivers reliable performance, fitment, and results.