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⚠️ Happy Holidays! Due to high order volume, please allow 1–3 business days for order processing. We appreciate your understanding. ⚠️
⚠️ Happy Holidays! Due to high order volume, please allow 1–3 business days for order processing. We appreciate your understanding. ⚠️

Finding the correct V-Band Clamp or Flange doesn't have to be so complicated. We hope that the provided dimensions and the "How to Measure a V-Band Flange" section in the PDF below will be useful to you—whether you find the replacement component in our inventory or from another company.

V-Band Clamp and Flange Dimensions

We understand that finding a compatible replacement V-Band Clamp or V-Band Flange for an existing product or application can be quite challenging. One of the most common questions we hear from both new and existing customers is, “Why is finding a replacement V-Band component so difficult?”

One of the main reasons for this difficulty is the lack of industry-standard sizing. There isn't an agreed-upon and recognized dimension and sizing standard used by all manufacturers of V-Band components. This lack of standardization can be seen in our own inventory, where we offer three potential V-Band Flange options for each matching tube size in the hopes that one will be suitable for our customers' applications.

The lack of industry-standard sizing has led to thousands of OEM and aftermarket automotive and industrial products using odd and hard-to-find V-Band Clamps and Flanges. Finding a replacement component for an existing product often turns into a guessing game for aftermarket manufacturers, repair facilities, and end-users searching for a compatible Clamp or Flange. In some cases, OEM manufacturers intentionally produce products that use proprietary-sized V-Band Clamps and Flanges to be the only supplier for the replacement components. This makes finding replacement components both difficult and expensive. We hope the information provided below will be useful for learning how to measure a V-Band Flange and find the right matching replacement component.

HOW TO MEASURE A V-BAND FLANGE

As mentioned in a previous blog post, there are five important parts of a V-Band to measure when trying to find a compatible V-Band Flange or V-Band Clamp. Once these measurements are known, finding a compatible component for an existing application becomes much easier.

  1. FLANGE COUNTERBORE ID / MATCHING TUBE SIZE OD
    V-Band Flange Counterbore ID Matching Tube Size OD | Ace Race Parts
    Using a measuring tape or caliper, measure the outside diameter (OD) of the matching tube or pipe size that will be welded to the flange. If the tube or pipe is not available, measure the inside diameter (ID) of the counterbore of the weld side of the V-Band Flange.

  2. OVERALL FLANGE OUTSIDE DIAMETER (OD)
    V-Band Flange Overall Outside Diameter | Ace Race Parts
    Using calipers, measure across the largest part of the seating surface of the flange to find the “Overall Flange OD”.

  3. FLANGE APEX WIDTH
    V-Band Flange Apex Width | Ace Race Parts
    Using calipers, measure the Apex Width, or flange edge thickness, of the Flange. Please note, the Apex Width measurement needs to be taken using only the “flat” part of the edge of the flange. When calculating the apex width of a clamp, double the measurement of a single flange.

  4. FLANGE BASE WIDTH
    V-Band Flange Base Width | Ace Race Parts
    Using calipers, measure the Flange Base Width. 

  5. FEMALE RETAINER DIAMETER AND DEPTH
    V-Band Flange Female Retainer Diameter | Ace Race Parts
    Using calipers, measure the Female Retainer Diameter and Depth. If measuring the Male Flange, measure the diameter and height of the Male ring. If your V-Band Flanges are “flat style” and do not feature a Male/Female Interlocking design please disregard this step. Note, a Female Flange can be combined with a flat style flange if a matching flat style flange is not available.

V-BAND FLANGE DIMENSIONS — PDF DOWNLOAD AVAILABLE

We hope that the following PDF file, containing our V-Band dimensions and important measurement points, will provide enough information to help you find a compatible component. To download a copy of the PDF click here: V-Band Flange Dimensions.


Additional Information

Did you know that for each V-Band Clamp or V-Band Assembly that we sell we send two types of nuts?The two types of nuts that we supply are a zinc plated Hex Lock Nut (non-nylon) and a zinc plated Non-Locking Hex Nut.

The Hex Lock Nut is to be used during final installation only. The purpose of a lock nut is to ensure that the nut stays "locked" in place on the threaded fastener section and is one element that helps create the air-tight seal that V-Band Clamps are known for.

The Non-Locking Hex Nut is provided so that the clamp can be used during mock-up, fitment, and pre-installation situations, or other situations where a lock nut is not required.

We would like to reiterate that the metal lock nut is a locking-style nut and is not intended to be used during mock-up. Metal lock nuts will begin to “lock” onto the bolt as soon as it is threaded on. Metal lock nuts should NOT be removed frequently.

Attempting to thread, remove, and re-thread the lock nut may cause damage to the "T-Bolt" section of the clamp. In some cases, excessive force can damage and/or break the "T-Bolt" section of the exhaust v-band clamp. If you intend to use our clamps during the mock-up process please use a non-locking hex nut.

DISCLAIMER:
Ace Race Parts is NOT responsible for damaged caused to our clamps due to the use of any locking-style nut during mock-up or during the removal process. We do not offer a warranty on the threaded portion of an V-Band Clamp.

COMPATIBILITY DISCLAIMER:
Due to flange dimension differences, "Standard" style and "Quick Release" style V-Band Clamps and Flanges are NOT cross-compatible. Ace Race Parts is NOT responsible if incompatible V-Band components are ordered. We do not offer any compatibility guarantee with any other brand of V-Band components.

Please note that the lock nuts supplied with our V-Band Clamps do not require a great amount of torque to be secured on the clamp. The torque specifications listed below apply to all sizes and styles of our V-Band Clamps.

  • Dry Torque Specs: 10-14ft/lbs
  • Lubed Torque Specs: 7.2-10ft/lbs

Please note that an impact wrench should never be used to install a V-Band Clamp.

For more V-Band Clamp installation notes and fastener information please click here: V-Band Clamp Installation Notes


V-Band Clamp and Flange Categories