Privacy policy

You don’t need an account to use this site. We count page views and clicks on outbound links with our own cookieless counter (no IP addresses stored). To see how you found us, we store a first-party cookie (lsb_src, for 60 days) with the ad source, medium, campaign and content from the link you opened, the website that linked here (just its name, not the full address), the first page you opened, and when. We do not store your IP address or ad click ids in that cookie or on your order. The same note is saved with your account and your order. Some guides embed our videos with YouTube’s privacy-enhanced player. Loading a player connects your browser to YouTube/Google, and playback may set YouTube cookies. See Google’s privacy policy. We use Google Analytics, which sets cookies to measure visits; see how Google uses data from sites that use its services. We also use Microsoft Clarity, which records how visitors use pages (clicks, scrolling and anonymized session replays and heatmaps) and sets cookies; form input is masked. See Microsoft’s privacy statement. We use the Meta pixel to measure our Facebook and Instagram ads. On our public pages it tells Meta which page you opened, the campaign labels in the link you came from (utm source, medium, campaign and content), the address of the other website that sent you (just the site, not the full address), and when you click to start a pre-order. It never sends what you type or pick on a page, such as planner choices or search text. When you send a Tune Report, the next page tells Meta only that a report was sent. When you pay for an order, it tells Meta that an order was paid and the amount. It never sends your email, name, vehicle, VIN or tune details. Our account pages never load Meta’s code; the page after a Tune Report and the page after a payment send only the one-time notice above. The pixel keeps two Meta cookies for 90 days: _fbp, a random browser id, and _fbc, which holds the ad click id if you came from one of our Facebook or Instagram ads. If your browser sends Global Privacy Control, nothing is sent to Meta. See Meta’s privacy policy. We use the Google Ads tag to measure our Google ads. On our public pages it tells Google which page you opened and the address of the other website that sent you. The referrer is only that other website’s origin, or nothing: it is never a path or query, and it is never this site’s previous address. The page address sent is this site’s path without its query, so it never includes what you type or pick on a page, such as planner choices or search text; our other analytics events are sent to Google Analytics only. When you send a Tune Report, the next page tells Google only that a report was sent. When you pay for an order, it tells Google that an order was paid, the amount and the currency. Our account pages load no Google tag library and no Google Ads container: the page after a Tune Report or a payment sends only that one conversion, as a single image request with the label and, for a payment, the amount and currency. That request can include the ad click id from _gcl_aw (or the app/web braid from _gcl_gb) when you came from one of our Google ads, so Google can match the conversion to that click; it sends nothing else: no page view, no referrer, no email, name, phone, address, vehicle, VIN or tune details, and no order number or transaction id. On our public pages, the tag can keep Google’s conversion-linker cookies for 90 days: _gcl_aw, which holds the ad click id if you came from one of our Google ads, and _gcl_au, which helps Google match a later conversion to that click. If your browser sends Global Privacy Control, nothing is sent to Google Ads. See Google’s advertising privacy policy. You can block Google Analytics, Clarity, the Meta pixel and the Google Ads tag with your browser settings, and Google Analytics with its opt-out add-on. If you use "Email me this build" in the swap planner, we send the link to your plan through our email provider, Brevo, which keeps a delivery log. We do not keep your address for anything else unless you also tick the box to join our email list. If you join the list, we use your address only for our newsletter and announcements, Brevo stores it for us, and every email has an unsubscribe link. See Brevo’s privacy policy. Messages sent through the corrections form, and the email address if you give one, are delivered to our inbox through Brevo and used only to handle that message. If you send us a question with our Ask us form, or the "Questions first?" box on the pre-order page, we email it to our inbox through Brevo and keep your address and your question on our server for 30 days so we can answer it; then it is deleted (server backups are kept for up to 6 weeks). We use your address only to answer you. If you ask us to email you a link to finish your Tune Report on your computer, we send that one email through Brevo with a 24-hour sign-in link; using it signs you in, which creates an account for your address if you don’t have one yet. Your address is not added to any list. If you start a Tune Report without signing in, we keep your email, your answers and your files in temporary private storage and send you one link through Brevo to confirm your email; we don’t read your files until you confirm. An unconfirmed submission expires after 3 days and is deleted with its files; backups of our server are kept for up to 6 weeks, so its details or files can remain in a backup until that backup is deleted. Once you confirm, it is a normal order on your account, kept and deleted like any other.

Tune Reports, pre-orders and your account. Ordering a Tune Report or a Full Custom tune creates an account on our site (you sign in with a link we email you; there is no password, and a sign-in lasts up to 30 days on that browser). We keep your email, your orders, your build details and the messages you send, your tune file and logs, the reports and files we make for you, and your VIN, for as long as you have the account, until you ask us to delete them. Your order page shows only the last 6 characters of your VIN. To notice the same vehicle or the same file sent again, we keep one-way codes made from the VIN and the engine computer serial in your file and from the file itself; they can’t be turned back into the VIN or the serial, and they are deleted with your order. Payments go through Stripe. We keep the payment record (amount, date, order number) as tax and payment rules require, also after you ask us to delete your data; the name you typed at checkout is deleted with your order. A pre-order placed without signing in and never paid is deleted with its files after 3 days. We use the settings in the tune files we receive, anonymized, to keep improving our comparisons for everyone. When you ask us to delete your data, we delete everything above from our server and our own computers, except the payment record and one anonymized copy of the tune: only its settings, numeric log channels and general facts such as engine size, cam type, make, model and decade, with no VIN, name, email, file name or order number, and no link back to you. Backups of our server are kept for up to 6 weeks, and our own backups of customer files for up to 30 days, so deleted data can remain in a backup until that backup is deleted.

When you open your Tune Report in your account, our own code (no third-party analytics) records when you view it, how long it is on screen, your device type (phone, tablet or computer) and the furthest section you reach, linked to your account, to improve our reports. We are notified of this, and of any feedback you send about a report, by internal emails sent through Brevo. We contact you about your feedback only if you say we may. We do not sell personal data.

Affiliate partners may set cookies when you click through to their sites; their privacy policies apply there.