Performance builds are often defined by the big modifications: an upgraded intake, larger brakes, aftermarket wheels, a more aggressive exhaust, or a complete aero package.

But once those major components are installed, the smaller details become increasingly noticeable.

Goldenwrench takes that final stage of vehicle refinement seriously.

Its Blackline Performance range focuses on precisely designed engine-bay and exterior detail components for performance vehicles, with a strong emphasis on BMW M applications. The catalog at XPH includes engine cap sets, oil cap covers, coolant and charge-cooler tank cap covers, fuel and washer-fluid cap upgrades, hood-latch handles, and other application-specific accessories.

The range also extends to platforms such as the Toyota A90 Supra, Toyota GR Corolla, Toyota GR Yaris, and MINI F5X JCW/GP3.

Blackline Is About the Details

Goldenwrench products are designed for enthusiasts who want more than a completely stock engine bay.

Instead of replacing major mechanical components, Blackline products focus on the pieces that are normally overlooked.

Factory caps and handles can be functional without contributing much to the visual character of a build. Goldenwrench gives these components a more deliberate appearance through billet-style construction, distinctive finishes, and vehicle-specific designs.

That makes the products particularly well suited to detailed OEM-plus and show-oriented builds.

BMW M Engine Cap Sets

One of the most prominent areas of the Goldenwrench catalog is its BMW M engine cap sets.

For the S58 engine, Goldenwrench offers complete Blackline cap sets for BMW M applications, including the G80/G81 M3, G82/G83 M4, and G87 M2.

The S58 engine cap sets are available in several finishes, including:

• Edition Red
• Motorsport Blue
• Anthracite Grey
• IND-painted finishes

The standard colored versions provide a relatively straightforward way to introduce contrast into the engine bay, while the IND-painted version allows for a more customized appearance.

These sets are designed as a coordinated group rather than isolated engine-bay accessories, making it easier to maintain a consistent finish throughout the installation.

S63 and S68 Engine Cap Sets

Goldenwrench also offers a dedicated Blackline engine cap cover set for BMW M cars using the S63 and S68 engines.

The S63/S68 set is available for applications including BMW M vehicles such as the F90 M5 and other supported S63/S68-powered models.

XPH also carries the CCB Gold Cap Complete Set version of the S63/S68 engine cap cover set.

This gives owners another way to create a distinctive engine-bay theme while retaining the factory layout and functionality of the underlying components.

Individual BMW M Oil Cap Covers

For enthusiasts who don't need a complete engine cap set, Goldenwrench offers individual oil cap covers.

The BMW M Car Series oil cap covers are available in finishes including:

• Edition Red
• Motorsport Blue
• Anthracite Grey
• IND-painted options

The E/F-chassis M Car Series oil cap cover is available separately, making it possible to upgrade one of the most visible components in the engine bay without purchasing a complete set.

The IND-painted version takes the same concept further by allowing the component to match the specific color direction of the vehicle or build.

F-Chassis Oil Filter Housing Cap

Goldenwrench also offers a Blackline Performance oil filter housing cap specifically for BMW M Car F-chassis applications.

This is another example of the brand's approach: take a functional component in an otherwise heavily engineered engine bay and give it a more purposeful appearance.

For owners building an F-chassis M car with upgraded engine-bay components, an aluminum-style oil filter housing cap can help bring the surrounding details together.

Charge-Cooler Tank Cap Covers

BMW M cars with charge-cooling systems also receive dedicated Goldenwrench hardware.

The Blackline charge-cooler tank cap covers are available in finishes including:

• Edition Red
• Motorsport Blue
• Anthracite Grey
• IND-painted finishes

Goldenwrench also offers a dedicated F8X S55 Blackline Performance Charge Cooler Cover for BMW F8X applications.

These products add another coordinated detail to the engine bay and work particularly well alongside the matching oil and coolant cap options.

Coolant Expansion Tank Cap Covers

The coolant expansion tank is another area where Goldenwrench offers application-specific detailing.

BMW M Car Series coolant expansion tank cap covers are available in Edition Red, Motorsport Blue, Anthracite Grey, and IND-painted versions.

The range allows owners to either create a consistent color theme across the engine bay or use a single component as a contrasting accent.

For example, matching an Edition Red coolant cap with an Edition Red oil cap and charge-cooler cap creates a noticeably more coordinated appearance than mixing unrelated finishes.

Washer Fluid Caps for BMW M Cars

Goldenwrench also moves beyond the main engine components.

Its Blackline washer-fluid caps are available for several BMW applications, including G-chassis M cars and selected E/F-chassis vehicles.

The G-chassis washer-fluid cap is offered in:

• Edition Red
• Motorsport Blue
• Anthracite Grey
• IND-painted versions

The catalog also includes a BMW E9X/F95/MINI washer-fluid cap and a dedicated F-chassis washer-fluid cap.

These are small components, but they can be particularly noticeable when the hood is open.

Fuel Cap Covers

Goldenwrench's Blackline fuel cap covers bring the same design philosophy to the exterior of the vehicle.

BMW M Car Series fuel cap covers are available in Edition Red, Motorsport Blue, Anthracite Grey, and IND-painted finishes.

The fuel cap cover is an easy way to add a small amount of color or material contrast to the exterior without changing the vehicle's bodywork.

For a build where the owner is already using coordinated colors in the wheels, brake hardware, engine bay, or interior, this can become another small but deliberate visual detail.

Hood-Latch Handles for BMW M Cars

Goldenwrench doesn't limit its hood hardware to caps.

The Blackline Performance hood-latch handles are available for BMW M cars across several chassis generations.

For E-chassis applications, Goldenwrench offers an Edition Red hood-latch handle.

For F-chassis BMW M cars, the Blackline hood-latch handle is also available in Edition Red.

The G-chassis version is offered as a dedicated Blackline Performance hood-latch handle, with the XPH catalog also listing a left-hand-drive version.

These components replace the ordinary factory hood-latch handle with a more visually distinctive alternative.

A90 Toyota GR Supra Details

The Toyota GR Supra is another major application represented in the Goldenwrench catalog.

For the A90 Supra, XPH carries several Blackline components designed specifically around the B58-powered platform.

These include:

• A90 Supra oil cap cover
• A90 Supra coolant cap cover set
• A90 Supra Edition Red billet washer-fluid cap
• A90 Supra engine start button

The oil cap cover provides an engine-bay detail upgrade, while the coolant cap set allows the owner to coordinate multiple components.

The washer-fluid cap adds another exterior/engine-bay detail, and the engine start button brings the same philosophy into the cabin.

A90 Supra Engine Start Button

The Goldenwrench A90 Supra engine start button is one of the smallest products in the catalog, but it demonstrates the brand's approach particularly well.

Rather than changing the vehicle's major systems, it changes one of the components the driver interacts with directly.

It can therefore be used as a standalone detail upgrade or combined with the other A90 Supra Blackline components for a more complete theme.

GR Corolla and GR Yaris Cap Set

Goldenwrench also offers a dedicated Blackline Performance cap set for the Toyota GR Corolla and GR Yaris using the G16E-GTS engine.

The set is offered in Edition Red.

This gives owners of Toyota's high-performance three-cylinder platform an engine-bay upgrade that follows the same design philosophy as Goldenwrench's BMW M products.

It is a good example of how the catalog has expanded beyond BMW while retaining its focus on vehicle-specific performance details.

GR Corolla Rear Reflector Inserts

The Toyota GR Corolla also receives a Blackline Performance rear reflector insert set.

These inserts are designed specifically for the E210 GR Corolla and are available in multiple options.

Unlike the engine-bay cap products, the reflector inserts address exterior styling.

They allow owners to alter the appearance of the factory rear reflector area without undertaking a major body modification.

MINI F5X JCW and GP3 Engine Cap Set

Goldenwrench's catalog also includes a Blackline Performance engine cap set for F5X MINI JCW and GP3 applications.

This gives MINI performance models access to the same type of engine-bay detailing found throughout the BMW M range.

For owners who have already modified the intake, exhaust, suspension, or exterior of an F5X JCW or GP3, the engine cap set provides a way to continue that attention to detail under the hood.

Heritage Motorsport for Older BMW M Engines

Goldenwrench also caters to older BMW performance platforms.

Its Heritage Motorsport collection includes an oil filter cap for BMW M50, S50, S52, and S54 engines.

The catalog also includes a BMW M Blackline oil cap designed around the S54.

This is important because Goldenwrench is not exclusively focused on the newest G-chassis M cars.

Older BMW M engines can receive the same kind of visual refinement, allowing enthusiasts with E36, E46, and other classic BMW performance applications to incorporate modern-quality detail components into their builds.

A Range Built Around Coordinated Finishes

One of the strongest aspects of the Goldenwrench catalog is the ability to coordinate finishes across multiple products.

A BMW M owner can combine Edition Red oil, coolant, charge-cooler, fuel, and washer-fluid components.

Alternatively, Motorsport Blue or Anthracite Grey can create a more understated appearance.

For owners who want a more customized result, IND-painted versions are available for selected products.

This gives the same basic component several different visual roles depending on the overall build.

Engine Bay Detailing Without Changing the Engine

Goldenwrench products are not designed to increase horsepower.

That distinction is important.

These are primarily detail and presentation components rather than power-producing modifications.

Their value comes from improving the appearance and perceived quality of the finished vehicle.

That makes them complementary to modifications such as:

• Performance intakes
• Carbon-fiber engine covers
• Upgraded charge-air systems
• Cooling upgrades
• Turbocharger upgrades
• Engine dress-up components
• Carbon-fiber exterior parts
• BMW M performance modifications

They allow an enthusiast to continue refining the car after the major mechanical work has been completed.

Building a Complete Blackline Theme

A single Goldenwrench component can make a difference, but the products become particularly effective when combined.

For an S58 BMW M3, M4, or M2, a build could incorporate:

• S58 engine cap set
• Matching oil cap
• Charge-cooler cap
• Coolant expansion tank cap
• Washer-fluid cap
• Fuel cap cover

The exact combination depends on which components are included in the selected set, but the overall principle is the same: coordinate the visible hardware instead of treating each component as an unrelated modification.

OEM Function With a More Distinctive Appearance

Goldenwrench products are designed around factory locations and vehicle-specific applications.

That makes them different from generic engine-bay accessories that may require significant adaptation.

The purpose is generally to retain the factory component's role while improving its appearance.

This is particularly attractive for owners who want an OEM-plus result rather than a heavily altered engine bay.

The Final Details of a Performance Build

The most expensive component on a vehicle is not always the one that makes the biggest difference visually.

Once the major upgrades are complete, small components can become increasingly important.

A brightly finished oil cap can stand out against a carbon-fiber engine cover.

A matching coolant cap can reinforce the same color theme.

A billet hood-latch handle can replace a mundane factory piece.

A fuel cap cover can carry the theme onto the exterior.

None of these changes needs to transform the car individually.

Together, however, they can make the entire build feel more deliberate.

Goldenwrench at XPH

At XPH, the Goldenwrench catalog focuses on exactly these kinds of finishing details.

For BMW M owners, the range includes S58 and S63/S68 engine cap sets, oil cap covers, coolant expansion tank cap covers, charge-cooler covers, fuel cap covers, washer-fluid caps, oil filter housing hardware, and E-, F-, and G-chassis hood-latch handles.

The catalog also includes dedicated products for the Toyota A90 Supra, Toyota GR Corolla, Toyota GR Yaris, and F5X MINI JCW/GP3, along with Heritage Motorsport components for older BMW M engines.

If the major modifications are already in place and you're looking for the details that bring the build together, Goldenwrench offers a focused range of vehicle-specific upgrades.

Explore Goldenwrench at XPH: https://x-ph.com/goldenwrench/