Description

Key Details

Brand: 326POWER
Manufacturer: 326POWER Japan
Product: Gachabari Medium 1 Rear Fender 55mm Wide for S15 Silvia
SKU: Medium1R/fenderS15
Category: Aero
Subcategory: Fenders
Product Type: Rear overfender / wide rear fender
Compatible Vehicle: Nissan S15 Silvia
Lineup: Gachabari Medium 1
Rear Width Increase: Approximately 55 mm compared with stock
Rear Arch Position: Approximately 5 mm higher than stock
Rear Arch Lip Thickness: Approximately 30 mm
Factory Arch Lip Reference: Approximately 20 mm
Mounting Style: Cover-type rear fender
Factory Bumper Compatibility: Compatible
Factory Side Step Compatibility: Compatible
Additional Included Item: Fuel filler lid
Arch Area Construction: Additional FRP reinforcement around the arch area
Finish: Unpainted white gel coat finish
Installation Requirement: Test fitting, alignment adjustment, body preparation, and painting required
Common Use: Wider wheel fitment, lowered builds, stance cars, drift-style builds, street projects, show cars, and Japanese tuning-inspired S15 Silvia builds.

Common Applications

The 326POWER Gachabari Medium 1 Rear Fender is suitable for S15 Silvia owners who want additional rear body width for a more aggressive wheel and tire setup, lower stance, or stronger rear-quarter appearance. Its approximately 55 mm increase provides substantially more visual width than the factory body while remaining compatible with the original bumper and side-step arrangement. The 5 mm raised arch and thicker arch-lip section also make the design particularly useful for builds where additional arch modification may be needed to achieve the desired ride height and wheel clearance. Final compatibility depends on the vehicle's body condition, wheel and tire specification, suspension setup, ride height, rear bumper configuration, existing body modifications, and installation method. If you are unsure whether this Rear Fender is suitable for your S15 Silvia, please contact us before ordering. Contact us.

326POWER Character

326POWER is strongly associated with Japanese stance culture, low vehicle setups, aggressive wheel fitment, drift-inspired builds, and distinctive exterior styling. The Gachabari Medium series takes that character and applies it through additional fender width without requiring the extreme proportions of a full competition-style wide body. On the S15 Silvia, the Medium 1 rear fender gives builders more freedom to create an aggressive rear fitment while preserving recognizable factory body lines and compatibility with stock-shaped surrounding aero.

Gachabari Medium 1 S15 Design Notes

For the S15 Silvia, Gachabari Medium 1 uses a 45 mm-wide replacement-type front fender and a 55 mm-wide cover-type rear fender. This rear product is the 55 mm configuration. The official manufacturer specifically designed the rear to work with the original bumper and side step, allowing the wider quarter-panel appearance to integrate with factory-shaped exterior components rather than requiring a completely different bumper package.

55mm Wide Rear Fender Design

The Gachabari Medium 1 Rear Fender extends the rear body approximately 55 mm farther outward than the factory S15 fender. This gives substantially more room visually for aggressive rear-wheel fitment and produces a stronger rear stance. Because the added width is considerable, wheel width, wheel offset, tire size, camber, suspension height, and inner clearance should all be planned together with the bodywork rather than selecting the fenders independently from the rest of the setup.

5mm Raised Rear Arch

326POWER sets the rear wheel arch approximately 5 mm higher than the factory arch position. This helps provide additional room around the upper wheel area while retaining a natural relationship between the fender shape and the S15 body. The manufacturer also designed the arch lip with additional material so builders have more flexibility if further arch raising is required for an especially low vehicle or aggressive wheel setup.

30mm Arch Lip Design

326POWER refers to the inner edge of the wheel arch as the “mimi.” On the factory S15 fender, this section is approximately 20 mm thick, while the Gachabari Medium rear design increases it to approximately 30 mm. The purpose is to retain enough material around the wheel arch even if the installer chooses to raise or reshape the arch further. According to 326POWER, this helps prevent the arch proportions from becoming visually unbalanced after modification.

Reinforced Arch Area

The official manufacturer states that the area surrounding the wheel arch uses approximately twice the normal amount of FRP material. This additional material is specifically intended to provide strength around the part of the fender that may be modified when raising the arch. It also gives professional installers more usable material when shaping the fender for an individual wheel, tire, and ride-height setup.

Cover-Type Rear Fender

Unlike the Gachabari Medium 1 front fender, which is designed as a factory replacement, the rear version is a cover-type fender. This means the rear wide-fender component is installed over the applicable rear-quarter area rather than simply replacing a removable factory front-style panel. As a result, careful positioning, body preparation, and professional installation become particularly important for obtaining consistent gaps and a clean transition into the original vehicle body.

Factory Bumper and Side Step Compatibility

326POWER specifically states that the Gachabari Medium 1 rear fender is compatible with the factory bumper and factory side step. The manufacturer also notes that the Gachabari setup can be installed even when the vehicle retains the factory bumper. This makes the product suitable for customers who want a wider rear body without necessarily changing every surrounding aero component at the same time.

Fuel Filler Lid

The official Japanese 326POWER listing specifies that the S15 Silvia Gachabari Medium 1 rear configuration includes the fuel filler lid. This is an important detail because the widened rear-quarter design affects the fuel-filler area, and the dedicated component helps integrate that area into the finished wide-fender installation.

Wheel and Suspension Planning

An additional 55 mm of rear width can significantly change the relationship between the wheel and body. Wheel offset, wheel width, tire dimensions, camber, suspension travel, ride height, and inner clearance should therefore be considered before final bodywork is completed. The official manufacturer does not specify one mandatory wheel or tire setup, so the final specification should be determined according to the individual S15 and the desired fitment.

Installation and Fitment Notes

The Gachabari Medium 1 Rear Fender must be test fitted to the actual S15 Silvia before painting. Rear-quarter positioning, wheel-arch alignment, fuel-filler positioning, bumper transition, side-step relationship, tire clearance, suspension travel, and left-to-right symmetry should all be checked before permanent installation. 326POWER specifically instructs customers to perform temporary fitting, panel-gap adjustment, and vehicle-specific fitment work before paint. If mounting-hole locations are difficult to align, the manufacturer recommends gradually adjusting them, including elongated-hole processing where necessary. Additional trimming, arch work, sanding, bonding, drilling, fabrication, or body finishing may be required depending on the individual vehicle.

Aero Product Notes

The product is supplied unpainted in a white gel coat finish, and installation and painting are not included. 326POWER specifically identifies FRP material around the arch area and states that approximately twice the usual amount is used there to provide additional strength for arch modification. The complete product should be inspected, test fitted, aligned, prepared, and fully finished before painting. Because the rear fender is a cover-type body component and may be modified around the wheel arch, professional body-shop installation is strongly recommended.

Demo Image Notes

This listing is for the Gachabari Medium 1 Rear Fender configuration for the S15 Silvia. The manufacturer's demo vehicle is shown with additional components including the LS3.26 Body Kit, Universal Lip Type 2, and Manriki Wing. These items are separate and should not be considered included with the Rear Fender unless specifically stated otherwise. Wheels, suspension components, exhaust parts, and other modifications appearing on demo vehicles should also be treated as separate products.

Shipping and Lead Time

Availability may vary depending on supplier and production status.
Additional shipping fees may apply depending on destination.
International delivery timing may vary by country, customs clearance, and carrier.

Note: Shipping price listed on website is only for USA customers. For other country, please contact us individually after placing an order. We will revise the shipping quotation.

Important Notes

This is an authentic 326POWER Japan Gachabari Medium 1 product designed for the Nissan S15 Silvia. The Rear Fender uses a cover-type design that increases rear width by approximately 55 mm compared with stock and raises the wheel arch approximately 5 mm. The wheel-arch lip is approximately 30 mm thick compared with roughly 20 mm on the factory fender, giving installers additional material for further arch adjustment where required. 326POWER also uses additional FRP material around the arch area for reinforcement and confirms compatibility with the factory bumper and side step. The Japanese manufacturer listing specifies that the rear configuration includes the fuel filler lid. The product is supplied unpainted in white gel coat and requires test fitting, alignment, preparation, and painting before final installation. Other aero components shown on the demo vehicle are separate unless specifically stated otherwise. 326POWER states that the product was developed for shows and events, does not guarantee vehicle-inspection compatibility, and does not accept responsibility for damage arising from public-road use.

FAQ

Is this an authentic 326POWER product?
Yes. This is an authentic 326POWER Japan Gachabari Medium 1 aero product.

What vehicle is this Rear Fender designed for?
It is designed for the Nissan S15 Silvia.

What is the SKU?
The official 326 International SKU is Medium1R/fenderS15.

How much wider is the Rear Fender than stock?
It is approximately 55 mm wider than the factory rear fender.

Is the rear wheel arch raised?
Yes. The rear wheel arch is approximately 5 mm higher than stock.

How thick is the Gachabari Medium rear arch lip?
326POWER states that the arch-lip section is approximately 30 mm, compared with approximately 20 mm on the factory fender.

Can the arch be raised further?
Yes. 326POWER specifically designed the approximately 30 mm arch-lip area so installers can raise the arch further at the desired position while retaining material around the edge.

Is the arch area reinforced?
Yes. 326POWER states that approximately twice the normal amount of FRP material is used around the wheel-arch area to provide additional strength.

Is this a replacement-type rear fender?
No. The rear fender is a cover-type design.

Is it compatible with the factory rear bumper?
Yes. 326POWER states that the rear fender is compatible with the factory bumper.

Is it compatible with the factory side step?
Yes. The manufacturer specifically lists compatibility with the factory side step.

Can it be installed while retaining the factory bumper?
Yes. 326POWER states that the Gachabari Medium setup can be installed with the factory bumper.

Is the fuel filler lid included?
Yes. The official Japanese manufacturer page specifies that the Gachabari Medium 1 rear configuration includes the fuel filler lid.

Does this listing include the front fenders?
No. This listing is specifically for the Gachabari Medium 1 Rear Fender. The 45 mm-wide front fender and complete front-and-rear set are separate configurations.

How wide is the matching Gachabari Medium 1 Front Fender?
The matching front fender is approximately 45 mm wider than stock.

What finish does the Rear Fender come in?
It is supplied unpainted in a white gel coat finish.

Does it come painted?
No. Installation and painting are not included.

Does it need to be test fitted before painting?
Yes. 326POWER specifically requires temporary fitting, gap adjustment, and vehicle-specific fitment adjustment before painting.

Can mounting-hole adjustment be required?
Yes. If hole positions are difficult to align, 326POWER recommends gradually adjusting them, including elongated-hole processing where necessary.

Can additional bodywork be required?
Yes. As a cover-type wide rear fender, the exact installation may require trimming, arch work, sanding, drilling, bonding, fitting, or other body-shop preparation depending on the individual S15 and desired setup.

Should the wheel and suspension setup be planned with the fenders?
Yes. Because the fenders add approximately 55 mm of rear width, wheel offset, wheel width, tire size, camber, ride height, suspension travel, and body clearance should be considered as part of the overall build.

Does the demo vehicle show additional parts?
Yes. 326POWER states that its demo vehicle uses the LS3.26 Body Kit, Universal Lip Type 2, and Manriki Wing. These are separate products.

Can this be used on public roads?
326POWER states that the product was developed for show and event use, does not guarantee that it will pass vehicle inspection, and does not accept responsibility for damage arising from public-road use.

Is professional installation recommended?
Yes. Professional test fitting, arch and body preparation, alignment, paint preparation, and final installation are strongly recommended for this type of cover-style wide rear fender.