Interior Accessories

Interior accessories for performance and motorsport applications span everything from weighted shift knobs and racing steering wheels to dash-mounted device mounts and competition pedal kits — components that directly affect driver input, ergonomics, and cockpit control. Motor Sport Mayhem stocks 784 in-stock interior accessories across 48 brands, ranging from $4.00 to $1,155.00, covering street builds, track days, off-road rigs, and full competition setups.

Our Top Picks for Interior Accessories

Every product below was selected based on proven performance engineering, real-world fitment quality, and measurable value at its price point.

How to Choose the Right Interior Accessories

The interior is where driver and machine communicate — and the quality of that interface is determined by material grade, dimensional tolerances, and whether a part was engineered for the load it actually sees. Cheap interior parts fail not because they look wrong but because they use incorrect thread pitches, undersized mounting hardware, or surface finishes that degrade under hand oils and UV exposure within one season. The best interior accessories share three traits: they are machined or fabricated to precise dimensional specs, they use materials appropriate for their thermal and mechanical environment, and they install without modification to factory mounting points.

Key Specifications

For shift knobs, thread pitch and diameter are non-negotiable starting points — the two most common standards are 10x1.25mm and 12x1.25mm, but platform variations exist across M8, M10, M12, and specialty applications. A weighted knob should add meaningful mass in the 250–450 gram range to actually change shift feel; anything lighter is aesthetic-only. The height of the knob affects leverage geometry at the hand — taller knobs reduce throw effort by effectively lengthening the lever arm above the pivot point, which is why competition-oriented knobs tend to run taller profiles than OEM replacements.

Steering wheels and quick-release systems require matching hub adapters to the specific bolt pattern and spline configuration of the column. NRG's quick-release system uses a standardized 6-bolt, 70mm bolt circle, but not all aftermarket hubs share the same pattern — confirming hub-to-column compatibility before ordering a quick-release is essential. Racing steering wheels are typically 320–350mm in diameter, which tightens steering response and reduces input travel compared to the 370–400mm range common on OEM wheels, requiring correspondingly more arm movement at low speeds and making them less forgiving for daily driving.

Pedal kits and brake levers are the most directly safety-critical interior accessories in the category. Pedal surface texture matters: CNC-knurled aluminum and rubber-over-steel designs offer meaningfully different grip characteristics in wet or high-heat conditions. For track and autocross applications, a wider accelerator pedal pad that aligns with the brake pedal height enables proper heel-toe technique. Brake lever geometry on motorcycles determines reach and modulation leverage — adjustable levers allow setting the engagement point to match finger length and riding position.

Dash mounts, device holders, and cockpit organization hardware must be evaluated for the vibration environment they will see. A mount that is adequate for street use may fail under sustained off-road vibration loads — look for welded or solid-machined construction with steel hardware rather than cast zinc or plastic with adhesive mounting. Electronic components like pressure switches and Hobbs switches need to be matched to their port thread specification (typically 1/8 NPT or 1/4 NPT) and rated for the maximum operating pressure of the circuit they monitor, with appropriate connector terminations to avoid field-wiring issues.

Shift Knob Fitment Reference: Thread Pitch by Application Type

Price Guide

Entry ($4.00–$65.00): This range covers functional hardware like pedal pads, basic shift knobs, and mounting brackets — parts that do their job without premium materials or engineering. Build quality is adequate for street and light use, but expect cast components, basic anodizing, and minimal adjustability. Correct for budget builds or when the part is a wear item.

Mid-range ($65.00–$400.00): The majority of enthusiasts will find their best value here — CNC-machined billet knobs, quality quick-release systems, purpose-built dash mounts, and ergonomic pedal kits from brands with real engineering behind them. Material quality jumps noticeably in this range, fitment is tighter, and parts are designed for track-adjacent use without the full race premium.

Premium ($400.00–$1,155.00): Reserved for purpose-built competition gear and expedition-grade hardware — full tube door systems, high-capacity compressor refrigeration for overlanding, and SFI or FIA-rated cockpit components. The price is justified by certification standards, load ratings, and engineering validation that lower-cost alternatives simply don't carry.

Who Is This For?

Interior accessories serve one of the broadest customer bases in performance parts — from daily commuters upgrading ergonomics to full competition drivers optimizing every cockpit input surface.

Racing Competition — 7.8/10

Competition drivers score interior accessories the highest of any use case for good reason: in a race environment, the cockpit interface directly determines input speed, consistency, and fatigue levels over a full event. Weighted shift knobs reduce missed shifts under stress, competition pedal kits enable technique that stock ergonomics physically prevent, and racing-spec quick-release systems are safety-critical in an extrication scenario. With 128 products rated for this use, the selection covers everything from data-triggering switches to FIA-compliant control hardware.

Track / Autocross — 7.8/10

Track and autocross applications mirror competition priorities but with slightly more tolerance for street-use compromises. Heel-toe pedal geometry, short-throw shift feel, and steering wheel diameter all become tangibly important at the limit — modifications that feel subtle on the street reveal their value immediately on track. The 128 products rated for this application include the ergonomic and tactile upgrades that separate a confident driver from one fighting their own controls.

Street Performance — 7.4/10

Street performance buyers want the feel and aesthetics of motorsport hardware with the durability and legality required for daily use. This is the category's largest addressable market, and the 167 products rated here reflect that — billet knobs, aftermarket steering wheels, upgraded pedal sets, and cockpit accessories that make the driving experience more engaging without compromising registration or inspection compliance. Material quality and finish longevity matter more here than on track because daily sun, heat cycles, and skin contact accelerate degradation of inferior parts.

Daily Driving Comfort — 7.1/10

Comfort-focused buyers in this category are typically upgrading ergonomics that OEM designers compromised for cost: reach-adjustable levers, better-positioned pedals, improved device mounting for navigation, and interior organization hardware. With 153 products rated for daily driving comfort, this is the second-largest segment — and it skews toward products that solve real ergonomic frustrations rather than performance metrics. Fit quality and vibration isolation become the dominant evaluation criteria.

Weekend Off-Roading — 7.1/10

Off-road interior accessories are a distinct discipline — dash mounts that stay rigid over rocks, tube doors that open the cockpit for trail visibility and cooling, and storage solutions that keep gear accessible under sustained vibration. The 46 products rated for weekend off-roading are built to a higher structural standard than street-only parts because the load environment is fundamentally more demanding. Hardware retention, weld quality, and powder coat durability are the key specs to evaluate in this segment.

Trusted Interior Accessories Brands We Carry

The brands that dominate this category earned their position through engineering consistency, not marketing spend. NRG built its reputation on quick-release and steering wheel hub systems with tight machining tolerances and a standardized bolt pattern that made interchangeability a reality across their product line — 159 products in stock reflects how broadly their system covers the market. SPARCO and MOMO both carry FIA certification across significant portions of their steering wheel and pedal lineups, which means those products have been independently tested to competition safety standards rather than just claimed compliant. COBB's interior hardware is engineered as part of a broader platform approach, meaning their shift knobs are validated against the shifter geometry of the platforms they target rather than being universal-fit compromises. Wilwood brings its brake engineering credibility into pedal box and lever hardware at the premium tier, with the same attention to master cylinder geometry and pedal ratio that defines their race brake systems. Rugged Ridge and Body Armor 4x4 anchor the off-road segment with tube door systems and interior mounting hardware built to the structural standards that trails and rock crawling demand.

Frequently Asked Questions

Are acrylic mirrors distorted?

Acrylic mirrors inherently carry more optical distortion than glass mirrors because the material's lower rigidity allows surface flex, which bends the reflective plane and produces image warping — particularly at the edges. The degree of distortion depends on the thickness and backing support of the acrylic panel; thin, unsupported acrylic will distort noticeably while thicker backed units can be acceptable for non-critical applications. For any safety-critical rearward visibility use — interior rearview mirrors in street vehicles or competition — glass mirrors are the correct choice. Acrylic mirrors are best suited to aesthetic or decorative cockpit applications where precise optical accuracy is not a functional requirement.

Are aftermarket rear view mirrors legal?

In the United States, federal motor vehicle safety standards require that interior rearview mirrors meet FMVSS 111, which specifies minimum field of view and distortion limits — aftermarket mirrors that meet these standards are street-legal. Most quality aftermarket interior mirrors from established brands are designed to comply, but it is the buyer's responsibility to confirm compliance for their jurisdiction, particularly in states with stricter inspection standards. Convex or wide-angle mirrors are legal as interior mirrors in most states but are specifically prohibited from replacing exterior side mirrors under FMVSS 111. For competition use, sanctioning body rules (SCCA, NASA, etc.) define mirror requirements independently of road laws, and those specs should be confirmed against the specific rulebook for the series.

Are aftermarket shift knobs illegal?

Aftermarket shift knobs are legal for street use in all 50 US states — there is no federal regulation prohibiting their installation on road-going vehicles. The only practical legal consideration arises with vehicles that have integrated reverse lockout mechanisms; improperly installed knobs that disable or bypass the lockout collar could technically affect roadworthiness in a failure scenario, though enforcement is essentially nonexistent. Some states include a general clause about equipment that could distract or impair the driver, but no documented enforcement action has ever been taken against a shift knob under such language. For track and competition use, sanctioning bodies sometimes require that gear positions remain clearly marked — a knob that covers or removes the gear indicator could create a technical inspection issue.

Are aftermarket steering wheels good?

Quality aftermarket steering wheels from established manufacturers are genuinely better than OEM for performance driving applications — they are smaller in diameter (320–350mm vs. OEM 370–400mm), which reduces input travel and improves response, and their grip materials (leather, Alcantara, suede) offer better tactile feedback than OEM urethane. The critical caveat is that virtually all aftermarket steering wheels require removing the OEM airbag, which is a significant safety trade-off on street-driven vehicles and in many jurisdictions makes the vehicle non-compliant with safety equipment regulations. For dedicated track cars with roll cages and harnesses, this trade-off is standard practice. For street use, the ergonomic and aesthetic benefits are real, but the airbag deletion must be a fully informed decision — not an oversight.

Are all NRG Quick Release systems universal?

NRG Quick Release units use a standardized 6-bolt, 70mm bolt circle pattern on both the hub-side and wheel-side interfaces, which means any NRG quick-release will mate with any NRG-compatible steering wheel — that part is universal across their lineup. What is not universal is the hub adapter, which is vehicle-specific and must match the column spline count, boss diameter, and clock spring configuration of the specific platform being fitted. Running the wrong hub adapter will result in incorrect steering wheel centering, potential airbag clock spring damage, and column bearing wear. Always purchase the hub adapter specific to your vehicle application and confirm the adapter is compatible with the NRG quick-release version you select — Generation 2.0 and 3.0 units are not interchangeable in all configurations.

Building something specific? Our performance specialists can help you select the right Interior Accessories for your application — street, track, or full race build.