Specialist Servicing for your Porsche

Pre-purchase inspections and bore scope investigations
Servicing for classic and modern Porsche
Preparations for road, track or race
Engine rebuilds, gearbox rebuilds, full machine shop facilities



Full internal and external structural, electrical, suspension and mechanical checks, including bore scope investigations. Porsches inspected at our workshop for condition, damage and modifications to help verify provenance pre-purchase.


We have a fully equipped workshop in Warrington, Cheshire ready to service all models from 356 to 997. Our marque reputation has been built on trusted expertise and down-to-earth advice. All work undertaken is agreed with you in advance, and at competitive rates.


Our services also include facilities for full fast road, track or race preparation. This ranges from performance tuning and suspension setup to conversions of road cars for track use and competition, to interior roll cages and seats, and pre-track safety checks.


Engine Rebuilds



Aircooled engine rebuilds, 944 cylinder silicon rebores and gearbox repairs a specialty.

Machineshop Facilities



Cylinder head modifications for performance and repair. Twin-plug ignition conversions.

New and Used Parts



Supply of new and used parts for classic and modern Porsche. Call for details.

Performance Tuning



Engine remaps, performance upgrades, brake and suspension enhancements.


About Us

Unit Eleven is now owned and run by John Holland. John has over 30 years experience working on classic and modern Porsches. He made his reputation building and preparing Porsche racecars, providing track support and rebuilding engines for owners and other independent specialists. His down-to-earth approach and hands-on expertise are key to the personal service his customers have come to expect.

Classic Porsche

Classic aircooled Porsches are a speciality. Most main dealer workshops no longer have the intuitive understanding of these older models. We pride ourselves on having deep technical knowledge of these cars, that ensures your Porsche can be maintained, repaired or rebuilt to factory standards. We also service, repair and rebuild watercooled Porsches, and have extensive experience of 924, 944 and 968 transaxle cars.

Modern Porsche

If you are running a Boxster, Cayman, 996 or 997, we have full diagnostic equipment available to trace and resolve faults. We offer bore scope investigations to check for cylinder head/liner issues and have undertaken numerous rebuilds involving IMS bearing failures or RMS seal replacement.
We also fit stainless grills to protect radiators, heat exchangers and air-con condensers.


Porsche 930

911 Turbo SE

Factory slantnose turbo that we have maintained for past 13 years.

Porsche 914


Mechanical and gearbox restoration, and recommissioning after 5 years off the road.

Porsche 964RS

964 RS

Prepared for sprints, race and fast road. Previous Aintree lap record holder.

Porsche 911 3.2 Carrera

911 Carrera

Highly developed sprint and race car prepared for the track with Unit Eleven.

Porsche 993RS

993 RS

993RS that we have looked after for over 13 years.

Porsche 944

944 Turbo

Engine rebore with silicon compound treatment back to factory specs.

Porsche 964

964 Carrera 4

A customer car that we have maintained and rebuilt over the past 16 years.

Porsche 911 Turbo

911 Turbo

Long term customer car with heavily modified turbo engine.



Monday - Friday : 8:30am - 4:30pm

01925 852 000

15 Tatton Court, Kingsland Grange, Warrington WA1 4RR, CHESHIRE

Privacy Policy

The policy: This privacy policy applies between You, the user of this website and Unit Eleven Ltd, the owner and provider of this website.
Unit Eleven Ltd takes the privacy of your information very seriously. This privacy policy applies to the use of any and all Data collected by us or provided by you in connection with your use of the website.
This privacy policy should be read alongside, and in addition to, the adjacent Cookie and Terms of Use policies. If you do not agree to the following policies and terms you may wish to cease viewing / using this website, and or refrain from submitting your personal data to us via any of the contact media offered on this website.

Policy key definitions:

  • "Data" means collectively all information that you submit to Unit Eleven Ltd via this Website. The definition incorporates, where applicable, the definitions provided in the Data Protection Laws;
  • "I", "our", "us", or "we" refer to the business, Unit Eleven Ltd, the owner of this website.
  • "you", "the user" refer to the person(s) using this website.
  • "GDPR" means General Data Protection Regulation (EU)2016/679;
  • "Data Protection Laws" means any applicable law relating to the processing of personal Data, including but not limited to the Directive 96/46/EC (Data Protection Directive) or the GDPR, and any national implementing laws, regulations or secondary legislation for as long as the GDPR is effective in the UK;
  • "Website" means the website that you are currently using, https://www.unit11.net, and any sub-domains of this site unless expressly excluded by their own terms and conditions.

Other definitions:

In this privacy policy, unless the context requires a different interpretation:

  • the singular includes the plural and vice versa;
  • references to sub-clauses, schedules and appendices are references to sub-clauses, schedules and appendices of this privacy policy;
  • a reference to a person includes firms, companies, government entities, trusts and partnerships;
  • "including" means "including without limitation";
  • reference to any statutory provision includes any modification or amendment of it;
  • the headings and sub-headings do not form part of this privacy policy.

Scope of this privacy policy

  • This privacy policy applies only to the actions of Unit Eleven Ltd and Users with respect to this Website. It does not extend to any websites that can be accessed from this Website including, but not limited to, any links that we may provide to social media websites;
  • For purposes of the applicable Data Protection Laws, Unit Eleven Ltd is the "data controller". This means that Unit Eleven Ltd determines the purposes for which, and the manner in which, your Data is processed.

Data collected

We may collect the following Data, which includes personal Data, from you:

  • name;
  • contact information such as email addresses and telephone numbers;
  • a list of URLs starting with a referring website, your activity on this Website, and the site that you exit to (automatically collected);
  • vehicle information such as your car registration, make, model, chassis number and year of manufacture;

in each case, in accordance with this privacy policy.

How we collect Data

We collect Data in the following ways:

  • Data is given to us by you;
  • Data is received from other sources;
  • Data is collected automatically.

Data that is given to us by you

Unit Eleven Ltd will collect your Data in a number of ways, for example:

  • when you contact us through the Website, by telephone, post, email or through any other means;
  • when you make payments to us, through this Website or otherwise;
  • when you use our services.

in each case, in accordance with this privacy policy.

Data that is received from third parties

Unit Eleven Ltd will receive data about you from the following third parties:

  • Google;
  • Facebook;
  • Instagram.

Data that is received from publicly available third party sources

Unit Eleven Ltd will receive data about you from the following publicly available third party sources:

  • DVLA / VRM register;

Data that is collected automatically

To the extent that you access the Website, we will collect your Data automatically, for example:

  • we automatically collect some information about your visit to the Website. This information helps us to make improvements to the Website content and navigation. This may include your IP address, the date, times and frequency with which you access the Website and the way you use and interact with its content.

Our use of Data

Any or all of the above Data may be required by us from time to time in order to provide you with the best possible service and experience when using our website. Specifically, Data may be used by us for the following reasons:

  • internal record keeping;
  • improvement of our products / services;

in each case, in accordance with this privacy policy.

We may use your Data for the above purposes if we deem it necessary for us to do so for our legitimate interests. If you are not satisfied with this, you have the right to object in certain circumstances (see the section headed "Your rights" below).

Sharing of Data

We may share your Data with the following groups of people, for the following reasons:

  • our employees, agents and/or professional advisors - to enable us to provide services to you;
  • third party service providers that provide services to us which require the processing of personal data - to help third party service providers in receipt of any shared data to perform functions on our behalf that ensures we are able to continue running a sound business and enable continued available of our Website;
  • third party payment providers who process payments via phone or over the Website - to enable such providers to process customer payments and refunds;
  • relevant authorities - to enable us meet our legal obligations if required to share such information.

in each case, in accordance with this privacy policy.

Keeping Data secure

We will use technical and organisational measures to safeguard your Data, for example:

  • we store your Data on secure servers;

Technical and organisational measures include measures to deal with any suspected data breach. If you suspect any misuse or loss or unauthorised access to your Data, please let us know immediately by contacting us on tel: 01925 852 000 or by using the contact form.

Data retention

Unless a longer retention period is required or permitted by law, we will only hold your Data on our systems for the period necessary to fulfil the purposes outlined in this privacy policy or until you request that the Data be deleted.

Even if we delete your Data, it may persist on backup or archival media for legal, tax or regulatory purposes.

Your rights

You have the following rights in relation to your Data:

  • Right to access - the right to (i) request copies of the information that we hold about you at any time, or (ii) that we modify, update or delete such information. If we provide you with access to the information that we hold about you, we will not charge you for this, unless your request is unreasonable or excessive. Where we are legally permitted to do so, we may refuse your request. If we refuse your request, we will inform you of the reasons why.
  • Right to correct - the right to have your Data rectified if it is inaccurate or incomplete.
  • Right to erase - the right to request that we delete or remove your Data from our systems.
  • Right to restrict our use of your Data - the right to block us from using your Data, or limit the way in which we can use it.
  • Right to data portability - the right to request that we move, copy or transfer your Data.
  • Right to object - the right to object to our use of your Data, including where we use it for our legitimate interests.

To make enquiries, exercise any of your rights set out above, or withdraw your consent to the processing of your Data (where consent is our legal basis for processing your Data), please contact us on tel: 01925 852 000 or using the contact form.

If you are not satisfied with the way a complaint you make in relation to your Data is handled by us, you may be able to refer your complaint to the relevant data protection authority. For the UK, this is the Information Commissioner's Office (https://ico.org.uk).

It is important that the Data we hold about you is accurate and current. Please keep us informed if your Data changes during the period for which we hold it.

Links to other websites

This Website may, from time to time, provide links to other websites. We have no control over such websites, and are not responsible for the content of those websites. This privacy policy does not extend to your use of such websites. You are advised to consider the terms and policies of each third party site prior to using them.

Changes of business ownership and control

Unit Eleven Ltd may, from time to time, expand or reduce our business and this may involve the sale and/or the transfer of control of all or part of Unit Eleven Ltd. Data provided by Users will, where it is relevant to any part of our business so transferred, be transferred along with that part, and the new owner or newly controlling party will, under the terms of this privacy policy, be permitted to use the Data for the purposes for which it was originally supplied to us.

We may also disclose Data to a prospective purchaser of our business or any part of it.

In the above instances, we will take steps with the aim of ensuring the continued privacy of your Data.


You may not transfer any of your rights under this privacy policy to any other person. We may transfer our rights under this privacy policy where we reasonably believe your rights will not be affected.

If any court or competent authority finds that any provision of this privacy policy (or part of any provision) is invalid, illegal or unenforceable, that provision or part-provision will, to the extent required, be deemed to be deleted, and the validity and enforceability of the other provisions of this privacy policy will not be affected.

Unless otherwise agreed, no delay, act or omission by a party in exercising any right or remedy will be deemed a waiver of that, or any other, right or remedy.

This Agreement will be governed by and interpreted according to the law of England and Wales. All disputes arising under the Agreement will be subject to the exclusive jurisdiction of the English and Welsh courts.

Changes to this privacy policy

Unit Eleven Ltd reserves the right to change this privacy policy as we may deem necessary from time to time or as may be required by law. Any changes will be immediately posted on the Website and you are deemed to accepted the terms of the privacy policy on your first use of the Website, following the alterations.

You may contact Unit Eleven Ltd on tel: 01925 852 000 or by using the contact form.


This privacy policy was created from material supplied by Rocket Lawyer, version as of 1st May 2019.

Terms of use

By continuing to browse and use this Website, you are agreeing to comply with and be bound by the following terms of use, which together with our privacy policy govern Unit Eleven Ltd's relationship with you in relation to this Website:

  • The content of the pages of this website is for your general information and use only. It is subject to change without notice.
  • Neither we nor any third parties provide any warranty or guarantee as to the accuracy, timeliness, performance, completeness or suitability of the information and materials found or offered on this website for any particular purpose. You acknowledge that such information and materials may contain inaccuracies or errors and we expressly exclude liability for any such inaccuracies or errors to the fullest extent permitted by law.
  • Your use of any information or materials on this website is entirely at your own risk, for which we shall not be liable. It shall be your own responsibility to ensure that any products, services or information available through this website meet your specific requirements.
  • This website contains material which is owned by or licensed to us. This material includes, but is not limited to, the design, layout, look, appearance and graphics. Reproduction is prohibited other than in accordance with the copyright notice, which forms part of these terms and conditions.
  • All trade marks reproduced in this website which are not the property of, or licensed to, Unit Eleven Ltd are the property of their respective owners.
  • Unit Eleven Ltd is not associated, approved, endorsed nor, in any way, affiliated with Porsche Cars Great Britain Ltd., Dr. Ing. h.c.F. Porsche, AG (www.porsche.com) or any of its subsidiaries. The Porsche name and crest are trademarks of Dr. Ing. h.c.F. Porsche AG.
  • From time to time this website may also include links to other websites. These links are provided for your convenience to provide further information. They do not signify that we endorse the website(s). We have no responsibility for the content of the linked website(s).
  • Your use of this website and any dispute arising out of such use of the website is subject to the laws and courts of England and Wales.