Dash & Interior Trim

Dash and interior trim encompasses every driver-contact and cockpit-visibility component between your hands and the firewall — shift knobs, steering wheel hubs, pedal kits, dash mounts, and structural trim pieces that define both ergonomics and control precision. Motor Sport Mayhem stocks 104 in-stock interior trim parts from 48 brands, spanning $4.00 to $1,155.00, so whether you're building a dedicated track car or upgrading a daily driver, the spec you need is on the shelf.

Our Top Picks for Dash & Interior Trim

Every product below was hand-selected based on verified engineering quality, real-world fitment reliability, and the broadest application value across street, track, and off-road builds.

How to Choose the Right Dash & Interior Trim

The single biggest separator between interior trim that performs and interior trim that fails is material integrity under thermal and vibration cycling — cockpit temperatures in a track car routinely exceed 140°F, and vibration inputs from rough surfaces or performance drivetrains will expose every weak thread, loose tolerance, and brittle casting in your interior within a season. Certifications matter here: FIA-rated components are tested against documented structural and material standards, while motorsport brand nameplates alone carry no guarantee unless the spec sheet backs it up. Understand thread pitch before ordering any driver-input component — a mismatched shift knob thread will either strip immediately or require an adapter that introduces slop into every gear change.

Key Specifications

For shift knobs, mass and geometry are the two variables that control shift feel. Heavier knobs — generally 300g and above — use inertia to smooth out notchy transmissions, while taller profiles raise the pivot point and shorten effective throw arc. Thread pitch varies by manufacturer and platform: common specs include 10x1.25mm, 10x1.5mm, 12x1.25mm, and 16x1.5mm — confirm your shifter shaft spec before purchasing, because no amount of performance engineering recovers a wrong-thread installation.

Steering wheel hubs and quick-release systems require exact hub adapter matching to your steering column spline count and bolt pattern — a universal label does not mean truly universal fitment. NRG's quick-release series, for example, uses a proprietary 6-bolt pattern that is consistent within their ecosystem but requires their matched hub adapter on the column side. Running a mismatched hub adds rotational play that directly degrades steering feedback and, in a race application, creates a genuine safety hazard at speed.

Pedal kits should be evaluated for contact surface area, grip pattern, and mounting method. Over-pedal covers that clamp to OEM pedals introduce a small amount of flex and can shift under hard braking — true bolt-on replacement plates that use the factory pedal arm holes eliminate that compliance entirely. For heel-toe technique, the relative height offset between brake and throttle pedal faces is as important as the pedals themselves; adjustable pedal plates that allow vertical repositioning give drivers the ability to dial in their specific shoe size and foot angle.

Dash mounts and device brackets must be assessed for vibration resistance, not just static load rating. A mount rated for 2 lbs static may transmit enough harmonic resonance to corrupt GPS data or crack a tablet screen over a full race weekend. Look for mounts with rubber vibration isolation built into the interface between the bracket and the device, and confirm that the mounting base uses hardpoints in the dash structure rather than adhesive-only retention on surfaces that flex.

Shift Knob Thread Pitch Reference by Common Transmission Standard

Price Guide

Entry ($4.00–$65.00): Covers trim clips, switch bezels, basic pedal pads, and entry-level billet shift knobs — functional upgrades that clean up the interior or replace worn OEM pieces without engineering compromises, provided you verify fitment specs before ordering.

Mid-range ($65.00–$400.00): The zone where most performance enthusiasts land, covering weighted and carbon fiber shift knobs, full pedal plate kits, quality hub adapters, dash mounts, and replacement dash panels — here you're getting real engineering, proper tolerances, and materials that hold up under track use.

Premium ($400.00–$1,155.00): Reserved for tube door systems, expedition-grade refrigeration, FIA-certified driver input components, and full cockpit trim solutions for dedicated race and overland builds — the cost is justified by structural certification, thermal performance, and the kind of fitment precision that holds together when conditions get genuinely extreme.

Who Is This For?

Dash and interior trim serves a wider range of builders than any other single interior category — from weekend autocrossers dialing in driver ergonomics to overlanders configuring a functional cockpit for multi-day expeditions.

Racing Competition — 7.8/10

Interior trim scores its highest marks in the racing competition application because cockpit ergonomics directly affect lap times — proper pedal geometry, weighted shift throws, and a correctly positioned steering hub are not cosmetic choices at this level. The 7.8 score reflects the broad selection of FIA-compatible and motorsport-grade components that address real competitive requirements. Drivers running dedicated track builds should prioritize components that meet or exceed recognized motorsport certification standards rather than relying on street-grade hardware under competition loads.

Track / Autocross — 7.8/10

Matching racing competition at 7.8/10, track and autocross use cases benefit specifically from components that sharpen driver feedback — pedal kits that support heel-toe, shift knobs tuned for quick decisive throws, and dash mounts that keep timing and data equipment visible under lateral load. Autocross in particular punishes sloppy pedal geometry hard because the discipline demands precise throttle and brake modulation through tight, low-speed sections where technique is everything. Even incremental improvements in pedal surface area and shift knob weighting produce measurable consistency gains across a day of runs.

Street Performance — 7.4/10

Street performance registers a 7.4/10 because the category delivers real functional improvements for enthusiast daily drivers without requiring any structural modification to the vehicle. A properly weighted shift knob on a short-throw transmission transforms the feel of the entire drivetrain, and a quality pedal kit makes aggressive driving more accurate without sacrificing comfort on the commute. The broad price range in this category means street performance buyers can access genuine engineering quality without committing to race-spec pricing.

Easy DIY Install — 7.4/10

At 7.4/10 across 93 products, the DIY install score reflects that the majority of interior trim components are genuinely home-garage friendly — shift knobs thread on, pedal plates bolt to existing hardware, and dash mounts clamp or bolt to factory hardpoints in under an hour in most cases. The important caveat is thread verification and hub adapter compatibility — getting those two things wrong turns a 20-minute install into a parts return. With correct pre-purchase spec confirmation, most interior trim upgrades require nothing more than basic hand tools and a torque wrench.

Daily Driving Comfort — 7.1/10

The 7.1/10 comfort score recognizes that many interior trim upgrades materially improve the daily driving experience — ergonomic pedal kits reduce fatigue on long drives, quality shift knobs eliminate the numbness of stock plastic hardware, and proper dash organization through mounts and trim panels reduce cockpit clutter. This isn't about luxury; it's about a well-configured cockpit that keeps the driver less fatigued and more focused over hours of driving. Comfort-focused buyers should prioritize contact surface quality and thermal properties — a metal shift knob that scorches your hand in summer or freezes it in winter is not a comfort upgrade.

Trusted Dash & Interior Trim Brands We Carry

The brands that dominate this category earn their position through documented engineering standards, not marketing spend. NRG has built its reputation on a consistent quick-release ecosystem and hub adapter compatibility matrix that covers more column specs than any other single brand in the aftermarket. SPARCO and MOMO both carry decades of FIA homologation history — their driver-contact components are built to the same standards as the hardware used in professional single-seater competition. COBB approaches interior trim from a systems perspective, engineering shift components to complement their tune and drivetrain calibration products for specific platforms. Rugged Ridge and OMIX anchor the off-road and restoration side of the category, producing dash and trim components built to OEM dimensional standards for platforms that see real trail abuse. Cusco rounds out the competition side with pedal and driver ergonomic components that are standard equipment in Japanese touring and time-attack racing — their engineering tolerances reflect that pedigree directly.

Frequently Asked Questions

Are acrylic mirrors distorted compared to glass mirrors?

Acrylic mirrors do introduce more optical distortion than float glass because the material is softer and harder to polish to the same flatness tolerance — surface irregularities that would be rejected in a glass mirror pass quality control in acrylic. In a street or daily driving application the distortion is generally minor and acceptable, but in a competition environment where accurate distance and closing speed judgment matters, glass-backed mirrors are the correct choice. Acrylic's advantage is weight and shatter resistance, which is why it persists in motorsport cage mirror applications despite the optical trade-off. If you're running an acrylic mirror and notice image swim or size distortion at the edges, that's the material, not a defective unit.

Are aftermarket rear view mirrors street legal?

In the United States, federal motor vehicle safety standards require that a vehicle be equipped with at least one mirror providing a clear rearward view — they do not mandate that it be the OEM unit, which means compliant aftermarket mirrors are legal on public roads in all 50 states. The key word is compliant: a mirror must provide the legally required field of view and, on the driver's side, must meet SAE J1242 reflectance standards. Race-oriented mirrors that dramatically reduce field of view or eliminate the exterior driver's side mirror entirely may not meet state inspection requirements even if they pass federal minimums. Always verify your state's specific vehicle inspection code if you're removing OEM mirrors as part of a track build that also sees street use.

Are aftermarket shift knobs illegal to install?

Aftermarket shift knobs are legal for street use in every U.S. jurisdiction — they are a driver-contact accessory with no regulatory classification under federal or state vehicle codes. The only legal concern arises in California, where prop knobs or extended shifter handles that resemble prohibited weapon categories have occasionally drawn scrutiny, but a standard weighted or billet shift knob presents no legal issue anywhere. From a safety standpoint, the only mandatory requirement is that the knob be properly threaded and secured — a loose or improperly torqued shift knob is a genuine mechanical hazard regardless of its legal status. Install to torque spec, use thread locker if specified by the manufacturer, and the legal and safety picture is completely clean.

Are aftermarket steering wheels and hub adapters truly universal?

No — hub adapters are vehicle-specific on the column side, and the term "universal" in hub adapter marketing refers only to the steering wheel mounting face, not the column interface. The column side must match your specific steering column spline count, diameter, and clock spring configuration — using a mismatched hub introduces rotational play that degrades steering precision and can compromise airbag and horn circuit continuity. NRG's adapter system is one of the most widely covered, but even within that range each column-side hub is a discrete part number for a specific platform. If your vehicle still has an airbag system, removing the OEM wheel and hub also disables that safety system — this is a known and accepted trade-off on dedicated track cars, but it must be an informed decision on any vehicle that sees street use.

Are weighted aftermarket shift knobs actually worth the upgrade?

Yes, with a clear technical explanation: added mass at the top of the shifter shaft increases rotational inertia through the gear change, which smooths out the mechanical detents in the transmission and makes each shift feel more positive and less notchy — this is measurable, not subjective. The effect is most pronounced on transmissions with stiff or notchy syncros, where the added momentum helps seat each gear cleanly. On a very light, precise short-throw setup the benefit is smaller, but weighted knobs still improve consistency by reducing the precision required from the driver's wrist on each throw. The secondary benefit is ergonomic: a properly weighted knob at the correct height reduces arm fatigue over a long drive or a day of autocross runs, which compounds into better lap-to-lap consistency.

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