My brake caliper is not exactly centered over the brake disc - what should I do?

If your brake caliper is not exactly centered over the brake disc, in most cases it is not a problem. Depending on the vehicle, model year, and mileage, axle tolerances can occur – and this even in newer vehicles.The most important thing is:👉 The brake caliper must have sufficient clearance on the left and right to the brake disc so that nothing rubs or permanently touches it.Many brake calipers also have locking bolts. It may happen that:there is very little clearance on one side or the bolt lightly toucheswhile on the other side there is more playThis is generally not critical.🔧 This is how you proceed:Install brake pads:First check if the brake pads can be inserted cleanly and without resistance on both sides.If everything fits:If installation is possible without problems, you can simply gently push back the locking bolts – this usually resolves the issue.If it jams:If the brake pads cannot be installed, or only with difficulty, on one side, action is required.In this case, you can:slightly shim the adapter with suitable bushings to adjust the brake caliperor – depending on the situation – slightly mill the adapter so that the brake caliper is correctly centered again👉 The goal is always that the brake caliper is evenly aligned with the brake disc and the brake pads are seated freely and cleanly.

Why does the brake pad not cover the entire friction surface of the brake disc during a brake conversion, and what influence does this have on the braking performance?

In a brake conversion with components from different vehicle models, the radial height of the brake pad and the width of the friction ring do not necessarily match. The pad geometry is determined by the caliper being used. Therefore, part of the friction surface of the brake disc may remain unused, even though the components are mounted according to the intended conversion combination.The percentage coverage of the brake disc alone is not a measure of braking performance. For the generated braking torque, in particular, the contact pressure of the brake pads, the coefficient of friction, and the effective friction radius are crucial. The effective friction radius describes the distance between the wheel axis and the point of application of the resulting frictional force.A larger effective friction radius generates higher braking torque with the same contact pressure and coefficient of friction. If the caliper is positioned further out by the adapter, this lever arm increases. For example, if the effective friction radius increases by 15%, the braking torque increases by 15% under otherwise identical conditions—even if the pad does not utilize the entire width of the friction ring. What matters is the actual position of the pad, not just the outer diameter of the brake disc.In contrast, the pad area influences, among other things, the surface pressure, thermal load, and wear. Depending on its design, a larger brake disc can also allow for higher heat capacity and better heat dissipation.An unused ring on the brake disc is therefore not a sign that something is wrong or of inferior braking performance. What matters is the designed combination, the correct position of the brake pad on the friction ring, as well as the hydraulic and thermal coordination of the entire brake system.

Why do we offer custom paint finishes exclusively in RAL colors?

RAL color tones are clearly defined and easily understandable for all parties involved. This allows misunderstandings in color selection to be avoided and the desired color tone to be reliably assigned.Individual manufacturer colors, special color tones or freely chosen color names cannot be fully covered due to the very large variety of colors. Therefore, custom paint jobs for all offered brake calipers and brake system kits are only possible with a clear RAL color number.

Which RAL colors can we not offer for the coating of our brake calipers?

We can paint your brake calipers in almost all common RAL colors. However, an exception is RAL fluorescent colors (neon/fluorescent colors) – we cannot offer these for brake caliper painting.The reason: fluorescent colors work technically different from normal RAL colors (they require special pigments/layer structures) and are significantly more sensitive in the "brake" application area. For a consistently clean, robust surface, we therefore rely on paint structures that have proven themselves in the brake area – and fluorescent RAL is excluded here.We do not offer these RAL fluorescent colors (examples)RAL 1026 Fluorescent YellowRAL 2005 Fluorescent OrangeRAL 2007 Fluorescent Light OrangeRAL 3024 Fluorescent RedRAL 3026 Fluorescent Light RedRAL 6038 Fluorescent GreenTip: If you want a "neon look," we often find a very similar non-fluorescent RAL alternative that is visually close and much more suitable for brake calipers.

Why does the drilling of the brake disc fixing not match the wheel hub when converting the brakes?

In brake system modifications, OE components from different vehicle models are often combined. Although all functionally relevant dimensions are coordinated, the position of the hole for the standard brake disc fixing screw may differ from the threaded hole in the wheel hub. This is design-related and not an indication of a wrong brake disc or a faulty fit—provided that the components specified in the product description are used.The fixing screw is solely used to temporarily hold the brake disc on the wheel hub with the wheel disassembled. It does not perform the centering or the force-fit fastening of the brake disc.The centering is done depending on the modification over the centering collar of the wheel hub or an included centering ring. When mounting the wheel, the brake disc is flat and force-fit clamped against the wheel hub flange together with the rim using the wheel bolts or wheel nuts.The standard fixing screw is not used in this case. Drilling or machining the brake disc or the wheel hub is neither required nor intended.

What torque should be used to tighten the sealing nipples on the brake caliper?

We recommend tightening the sealing nipples on the brake caliper with 20 Nm.Why is this important?The correct torque ensures a secure seal. A too loose fit can lead to leaks, whereas over-tightening can damage threads or components.Should a torque wrench be used?Yes, for precise and safe installation, we recommend using a torque wrench.Should anything be checked after installation?Yes, the sealing nipple should be checked for tight fit and sealing afterward.

Large brake system KIT rear axle VW T3 Bus Porsche brake caliper handbrake caliper and handbrake cable from Golf 4 R32 - Colour brake caliper: blank without colour

Name: Large brake system KIT rear axle VW T3 Bus Porsche brake caliper handbrake caliper and handbrake cable from Golf 4 R32 - Colour brake caliper: blank without colour
Brand: EPYTEC
SKU: 611-KIT-Blank
Price: 1502.22 EUR
Availability: OutOfStock

€1,502.22*

Prices incl. VAT plus shipping costs

Available again on 03.11.2026

Product number: 611-KIT-Blank

Lieferung ab Tuesday, 03.11.2026, bestelle jetzt um es zwischen dem 04.11.2026 und 07.11.2026 zu erhalten.

Brake caliper color

Blank without color

Red with Epytec logo

Painted in the color of your choice

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19 Jahre Expertenwissen

With our large high-performance brake system kit for the T3 Bus (for all T3 Bus models), you can convert your rear axle to a 4-piston Porsche brake system combined with the Golf 4 R32 parking brake caliper and achieve ideal performance.
With this kit, you can upgrade to the following components:

- Brake calipers: Porsche 996 brake calipers
- Parking brake calipers: Golf 4 R32 parking brake caliper
- Brake discs: 300x22 mm A4 S4

With this high-performance brake system kit, you can use the Porsche 996 brake calipers and the Golf 4 R32 parking brake caliper in combination with the 300x22 mm brake discs from the A4 S4 on T3 Bus models.

The large brake system kit is not only sporty but also suitable for everyday use. Thanks to the drilled sports brake discs combined with our ceramic brake pads, it delivers ideal performance while simultaneously reducing brake dust, temperature and wear.

Another advantage of our brake system kit is that it uses the same original brake calipers and brake discs that are also installed in production vehicles. These OE parts not only make brake replacement simple and straightforward but also facilitate approval by TÜV.

With this high-performance brake kit, you can get started right away and have everything you need to convert your rear axle to a 4-piston brake system.

The large high-performance brake system kit is suitable for:

T3 Bus models

Advantages of this brake system:

our components, such as brake calipers and brake discs, come from production vehicles and are OE parts. This makes brake replacement simple and straightforward and facilitates approval by TÜV.
the material certificate included in the scope of delivery makes it possible to obtain approval through an individual inspection, even for standard production vehicles
high-performance brake pads with a longer service life than original pads
extreme braking performance, also in combination with our rear axle brake system
fits the models listed above directly and can therefore be easily converted back to the original condition at any time
our EPYTEC brake caliper adapters do not require you to send in your original parts or carry out any welding modifications, milling or drilling.

Note:

Please note that these brake calipers are supplied unpainted in bare metal so that you can paint them yourself.
Get our high-performance brake system kit now and experience ideal performance and durability.
!! The wheel hubs must be turned down on a lathe to accommodate the rear brake disc. (Even the wheel hubs we offer in our range still need to be turned down slightly)!!
The parking brake cable from the Golf 4 R32 must be used. Part number: 124C0160

Scope of delivery:

Brake calipers from the Porsche 996 (rear axle), part numbers: 996.352.422 + 996.352.421 (100% compatible only with the specified Porsche calipers) unpainted in bare metal
Brake discs from the A4 S4 rear axle in 300x22mm Original part no.: 8E0 615 601 R
2x matching centering rings
Matching brake pads for the parking brake caliper, part number: JZW698451
VW brake caliper bracket, part number 8N0 615 425 B.
2x conversion adapters for VW T3 to Porsche for the rear axle
2x matching stainless steel braided brake lines
Installation aid for brake disc installation
high-strength fastening bolts
Material certificate
Stress analysis / FEM calculation for approval
Installation instructions (click here)

We provide a TÜV certificate with this adapter. This means that the TÜV inspector can easily register the adapter.

FAQ: Häufige Fragen

Sollte ich die Anker- bzw. Staubbleche entfernen?

Wir empfehlen das Entfernen der Bleche, da sie die Belüftung einschränken. Ohne diese Barriere wird die Bremse effizienter gekühlt und bleibt auch bei starker Beanspruchung leistungsfähig.

Wie erleichtere ich mir die Felgenmontage?

Mit Radmontagehilfen gelingt das Ausrichten und Aufsetzen der Felge einfacher und präziser. Das schützt Gewinde und Felge und spart Zeit.

Radmontagehilfe ansehen

Benötige ich Spurverbreiterungen nach dem Umbau?

Welche Felgengröße passt, lässt sich pauschal nicht sagen. Streift die Felge minimal am Bremssattel, schaffen Spurverbreiterungen den nötigen Abstand.

Spurverbreiterungen ansehen

Brauche ich neue Bremsleitungen?

Für optimale Passform und stabile Bremswirkung empfehlen wir Stahlflex. Diese sind konfigurierbar und liefern konstantere Ergebnisse als Gummileitungen.

Stahlflex konfigurieren

Warum unsere Adapter die beste Wahl sind

Wusstest du, dass sich dein EPYTEC-Adapter oft schon nach dem ersten Verschleißteilwechsel komplett bezahlt macht?

Das liegt daran, dass du mit unseren Adaptern auf OE-Bremsscheiben und -Sättel setzt, die wir bewusst bei der Entwicklung der Adapter ausgewählt haben. Diese Komponenten sind nicht nur in höchster Qualität gefertigt und in Serienfahrzeugen im Einsatz, sondern durch ihre Großserienproduktion auch günstig und jederzeit verfügbar.

Für dich bedeutet das: erstklassige Bremsleistung ohne Abhängigkeit von teuren Speziallösungen anderer Hersteller.

Und selbst beim TÜV hast du es leichter, denn unsere OE-Komponenten sind bereits offiziell abgenommen – der Prüfer kann sich direkt darauf beziehen, sodass deine Eintragung unkompliziert und sicher abläuft.

Please note that our articles have been designed for racing and motorsport. Use in public road traffic usually requires an individual approval in accordance with § 21 StVZO by an officially recognised expert. Further information can be found under TÜV Süd. For the individual approval, we will provide you with an expert opinion or material certificate, if available.

Brake caliper hole spacing: 90

Brake caliper type: Porsche 996 4 Kolben Sattel Hinterachse

Farbe Bremssattel: Blank ohne Farbe

Hole spacing steering knuckle: 90

Manufacturer: Epytec

Mounting location: rear!

Weight: 24.9 kg

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Motor	Motorcode
1.9	25\|78PS(57KW)
1.6 D	25\|50PS(37KW)
1.6 TD	25\|70PS(51KW)
1.9	25\|83PS(61KW)
2.0	25\|70PS(51KW)
2.1 Syncro	25\|112PS(82KW)
1.6	25\|50PS(37KW)
2.1i	25\|92PS(68KW)
2.1 Cat	25\|95PS(70KW)
2.1 Syncro	25\|95PS(70KW)
1.9	25\|90PS(66KW)
1.9	25\|60PS(44KW)
1.7 D	25\|57PS(42KW)
2.1	25\|95PS(70KW)
1.9 Syncro	25\|78PS(57KW)
1.6 TD Syncro	25\|70PS(51KW)

Motor	Motorcode
1.9	24\|78PS(57KW)
2.1	24\|112PS(82KW)
1.9 Syncro	24\|78PS(57KW)
1.9	24\|83PS(61KW)
2.1 Syncro	24\|95PS(70KW)
2.1	24\|95PS(70KW)
1.9	24\|60PS(44KW)
2.1 Syncro	24\|112PS(82KW)
1.6 D	24\|50PS(37KW)
1.6 TD	24\|70PS(51KW)
2.0	24\|69PS(51KW)
2.1i	24\|92PS(68KW)
1.6 TD Syncro	24\|69PS(51KW)
1.7 D	24\|57PS(42KW)

Motor	Motorcode
1.6	26\|50PS(37KW)
1.6	21\|50PS(37KW)

Motor	Motorcode
1.9	25\|78PS(57KW)
1.6 D	25\|50PS(37KW)
1.6 TD	25\|70PS(51KW)
1.9	25\|83PS(61KW)
2.0	25\|70PS(51KW)
2.1 Syncro	25\|112PS(82KW)
1.6	25\|50PS(37KW)
2.1i	25\|92PS(68KW)
2.1 Cat	25\|95PS(70KW)
2.1 Syncro	25\|95PS(70KW)
1.9	25\|90PS(66KW)
1.9	25\|60PS(44KW)
1.7 D	25\|57PS(42KW)
2.1	25\|95PS(70KW)
1.9 Syncro	25\|78PS(57KW)
1.6 TD Syncro	25\|70PS(51KW)

Motor	Motorcode
1.9	24\|78PS(57KW)
2.1	24\|112PS(82KW)
1.9 Syncro	24\|78PS(57KW)
1.9	24\|83PS(61KW)
2.1 Syncro	24\|95PS(70KW)
2.1	24\|95PS(70KW)
1.9	24\|60PS(44KW)
2.1 Syncro	24\|112PS(82KW)
1.6 D	24\|50PS(37KW)
1.6 TD	24\|70PS(51KW)
2.0	24\|69PS(51KW)
2.1i	24\|92PS(68KW)
1.6 TD Syncro	24\|69PS(51KW)
1.7 D	24\|57PS(42KW)

Motor	Motorcode
1.6	26\|50PS(37KW)
1.6	21\|50PS(37KW)

VW T3 bus brake conversion Porsche brake caliper rear axle Brake caliper adapter Doka 300x22

✓ 300x22 8E0615601R A4 / S4 brake disc
✓ 4-piston 996352422 / 996352421 Porsche 996 brake caliper
✓ rear axle

€392.46*

Product number: 611