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.

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.

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.

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.

Big Front Axle Brake System KIT BMW E46 M3 BMW Performance 135i 6-Piston Brake System 345x28mm Brake Disc - Brake Caliper Color: Blue with Epytec Logo

Name: Big Front Axle Brake System KIT BMW E46 M3 BMW Performance 135i 6-Piston Brake System 345x28mm Brake Disc - Brake Caliper Color: Blue with Epytec Logo
Brand: EPYTEC
SKU: 804-KIT-RAL5002
Price: 1596.74 GBP
Availability: InStock

£1,596.74*

Prices incl. VAT plus shipping costs

Available

Product number: 804-KIT-RAL5002

Delivery by Tuesday, 01.09.2026 if you order within the next 1 Hour.

Brake caliper color

Blank without color

Blue with Epytec logo

Gelb mit Epytec Logo

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19 Jahre Expertenwissen

With our high-performance brake system kit for the BMW E46 M3, you can upgrade your front axle to a 6-piston brake system and achieve ideal performance.
This kit includes:

- Brake calipers: 6-piston BMW 135i Performance
- Brake discs: 345x28mm E46 M3 CSL

With this high-performance brake system kit / Big Brake Kit, you can install the BMW 135i Performance 6-piston brake calipers in combination with the 348x28mm brake discs from the BMW E46 M3 CSL on your BMW E46 M3

This brake system kit is not only sporty but also suitable for everyday use. The drilled sport brake discs combined with our ceramic pads provide ideal performance while simultaneously reducing brake dust, temperature, and wear.

Another advantage of our brake system kit is that it is equipped with the same original brake calipers and brake discs used in production vehicles. These OE parts not only make brake replacement simple and straightforward.

With this high-performance brake kit, you can get started right away and have everything you need to convert your front axle to a 6-piston brake system.

The high-performance brake system kit / Big Brake Kit is suitable for the following vehicles:

BMW 3 Series Coupe E46 M3 CSL
BMW 3 Series Convertible E46 M3
BMW 3 Series Coupe E46 M3
BMW 3 Series Touring E46 M3

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 TÜV approval.
Easy TÜV approval with parts certificate
High-performance brake pads with a longer service life than the original pads
Extreme braking performance, especially when combined with our rear axle brake system
Direct fitment for the models listed above and can therefore be returned to original condition at any time without issues
Our EPYTEC brake caliper adapters do not require you to send in your original parts, nor do they require welding, milling, or drilling modifications.

Note :

Please note that these brake calipers are supplied in blue with the Epytec logo.
Secure our high-performance brake system kit now and experience ideal performance and durability.

Scope of delivery:

2x new BMW 135i Performance 6-piston brake calipers part number: 34116786741 / 34116786742: in blue with Epytec logo
Including complete new retaining clip kit for the brake calipers
Matching set of Zimmer sport brake discs 345x28mm
2x ceramic brake pads for less brake dust and longer service life
2x brake caliper adapters for BMW E46 M3
2x matching stainless steel braided brake lines
High-strength fastening hardware
Material certificate
Stress analysis

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 type: BMW 135i Performance 6 Kolben

Farbe Bremssattel: Blau mit Epytec Logo

Manufacturer: Epytec

Mounting location: front

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Motor	Motorcode
M3	E46\|343PS(252KW)
M3 CSL	E46\|360PS(265KW)

Motor	Motorcode
M	E85\|343PS(252KW)

Motor	Motorcode
M3	E46\|343PS(252KW)

Motor	Motorcode
M3	E46\|343PS(252KW)
M3 CSL	E46\|360PS(265KW)

Motor	Motorcode
M	E85\|343PS(252KW)

Motor	Motorcode
M3	E46\|343PS(252KW)

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