Upgrade Your Audi A4 / S4 / RS4 with Performance Parts
Browse a range of aftermarket parts for the Audi A4 / S4 / RS4 at Regal Autosport. Whether you're building together a fast road car or a dedicated track-day setup, you'll find quality upgrades designed to sharpen handling, improve stability, and lift the driving experience. UK and worldwide delivery available.
1753 Products
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Maxton Design AU-A4-B9-FD1GMaxton Front Splitter V.1 Audi A4 B9
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Maxton Design AU-A4-B9-SLINE-FD4GMaxton Front Splitter V.4 Audi S4 / A4 S-line B9
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Maxton Design AU-A4-B9-SLINE-RSD2GMaxton Rear Side Splitters V.2 Audi A4 S-Line B9
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Maxton Design AU-A4-B9-SLINE-AV-CAP2GMaxton Spoiler CAP V.2 Audi S4 / A4 S-Line B9 Avant
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Maxton Design AU-A4-B9-SLINE-FD3GMaxton Front Splitter V.3 Audi S4 / A4 S-line B9
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Maxton Design AU-A4-B9-SLINE-FD2GMaxton Front Splitter V.2 Audi S4 / A4 S-line B9
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Maxton Design AU-RS4-B9-FD1GMaxton Front Splitter V.1 Audi RS4 B9
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Maxton Design AU-RS4-B9-AV-RS1GMaxton Rear Valance Audi RS4 B9 / B9 Facelift
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Maxton Design AU-RS4-B9-AV-RSD1GMaxton Rear Side Splitters Audi RS4 B9 / B9 Facelift
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Maxton Design AU-RS4-B9-AV-CAP1GMaxton Spoiler CAP Audi RS4 B9 Avant
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Maxton Design AU-RS4-B9-SD1GMaxton Side Skirts Diffusers Audi RS4 B9
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Maxton Design AU-RS4-B9-FD2GMaxton Front Splitter V.2 Audi RS4 B9
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Maxton Design AU-A4-B9-SLINE-AV-CAP1GMaxton Spoiler CAP V.1 Audi S4 / A4 S-Line Avant B9
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Maxton Design AU-A4-B9-SLINE-AV-RSD1GMaxton Rear Side Splitters Audi A4 S-Line B9 Avant
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Maxton Design AU-A4-B9-SLINE-RSD1GMaxton Rear Splitter Audi A4 B9 S-Line Sedan
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Maxton Design AU-A4-B9-SLINE-AV-RD1GMaxton Central Rear Splitter Audi A4 S-Line B9 Avant
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Maxton Design AU-A4-B9-SLINE-SD1GMaxton Side Skirts Diffusers Audi S4 / A4 S-Line / A4 Competiton B9
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Maxton Design AU-A4-B9-SLINE-FD1GMaxton Front Splitter V.1 Audi S4 / A4 S-Line B9
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Eventuri EVE-B9RS5-CF-INTEventuri Audi B9 RS5/RS4 Black Carbon intake with secondary duct
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About the Audi A4 / S4 / RS4
The Audi A4 / S4 / RS4 has built a strong following among enthusiasts over the years. It’s known for its solid engineering, distinctive design, and strong real-world performance. Whether you're carrying out worn components or adding upgrades than using high quality parts can help to keep your Audi A4 / S4 / RS4 performing the way it should.
Audi A4 / S4 / RS4 Parts & Accessories
From replacement components to enthusiast-focused upgrades, maintaining your Audi A4 / S4 / RS4 with quality parts can help preserve reliability and driving confidence. These performance parts can be used for both routine maintenance and performance upgrades which helps to keep the vehicle running reliably over time.