One of One - Custom Auto
Helping you unlock the true potential of your car with custom-built exhaust systems, in-house performance mods & regular servicing.
Your go-to specialist for anything Mazdaspeed.
This manifold wasnโt just built to look good, that was a by-product. ๐
๐ป
It was designed for faster boost, better fit, and a setup you canโt buy off the shelf on a Mazdaspeed.
Built for one car and with intent.
DM us if youโre planning a serious build ๐ฒ
Clean upgrades on this Mazdaspeed6๐ฅscott
15/10/2025
Fresh pipes for this โ92 Nissan Laurel ๐ฅ
Smooth flow, crisp sound.
Swipe ๐๐ป and turn up the volume.
09/07/2025
From Stock to Street-Ready.
This Mazdaspeed3 rolled in bone stock. Now itโs breathing, sounding, and pulling like it should.
We equipped it with a full 4" aluminum air intake, paired with a high pressure fuel pump upgrade kit to safely support more airflow and fuel delivery.
One step colder plugs (LTR7IX-11) went in for more reliable spark under increased boost, while the Damond rear motor mount stiffened up the drivetrain response - goodbye slop, hello sharper shifts.
Out back, our custom-built 3" stainless steel cat-back exhaust, featuring an AdrenalinR mid-muffler and shotgun tips, gave it the bark to match the biteโaggressive tone, clean welds, zero drone.
Cooling? Sorted. We built and installed a full front mount intercooler set-up using a Treadstone core and custom fabricated piping to keep intake temps in check under spirited driving.
This setup is clean, functional, and fully done in-house.
If youโre driving a Mazdaspeed and still stock or lightly moddedโthis is your sign. These upgrades donโt just wake the car up, they transform the entire driving experience.
๐Ready to upgrade your Speed? Send us a message or drop by the shop. Weโll build it right, just like we did this one.
๐ Pickering
12/03/2025
Ever wondered what a K04 turbo inhaling through a 4โ intake sounds like? Swipe ๐๐ปfor pure, unfiltered turbo noises straight from the source ๐๐ต
Our custom 4โ aluminum intake with BOV is designed for max airflow and faster boost recovery on every shift. ๐ฌ๏ธ
DM us to get yours and let your car breathe freely like it should!
05/03/2025
Aarizโs Gen1 [LWKY8U] came in for a full performance transformation, and we delivered! Hereโs a breakdown of the upgrades that took this build to the next level:โฃ
โฃ
๐น๐๐๐๐๐ & ๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐โฃ
โข ๐๐๐๐ฅ๐๐ฌ ๐๐ง๐๐ข๐ฅ๐ฌ ๐๐๐๐๐๐๐๐ซ ๐ญ๐ฎ๐ซ๐๐จ โ faster spool, more powerโฃ
โข ๐๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐ญ๐ฎ๐ซ๐๐จ-๐๐๐๐ค ๐๐ฑ๐ก๐๐ฎ๐ฌ๐ญ โ improved flow & aggressive soundโฃ
โข ๐๐ ๐๐จ๐ฐ๐๐ซ ๐๐ฑ๐ก๐๐ฎ๐ฌ๐ญ ๐ฆ๐๐ง๐ข๐๐จ๐ฅ๐ โ better boost responseโฃ
โฃ
๐น๐๐๐๐๐๐ & ๐
๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐๐๐โฃ
โข ๐๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐โ ๐ข๐ง๐ญ๐๐ค๐ โ maximized airflow for the turboโฃ
โข ๐๐จ๐ซ๐ค๐๐ฉ๐จ๐ซ๐ญ ๐ข๐ง๐ญ๐๐ค๐ ๐ฆ๐๐ง๐ข๐๐จ๐ฅ๐ & ๐ญ๐ก๐ซ๐จ๐ญ๐ญ๐ฅ๐ ๐๐จ๐๐ฒ โ optimized airflow for power gainsโฃ
โข ๐๐๐
๐ ๐ฎ๐ฉ๐ ๐ซ๐๐๐ โ essential for fueling under high boostโฃ
โข ๐๐ฅ๐๐๐ง๐๐ ๐ข๐ง๐ฃ๐๐๐ญ๐จ๐ซ๐ฌ + ๐๐ฏ๐๐ซ๐ฌ๐ฉ๐๐๐ ๐๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐ข๐ง๐ฃ๐๐๐ญ๐จ๐ซ ๐ฌ๐๐๐ฅ๐ฌโฃ
โฃ
๐น๐๐๐๐๐๐๐ & ๐๐๐๐๐ ๐๐๐๐๐๐๐โฃ
โข ๐๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐
๐๐๐ ๐ฉ๐ข๐ฉ๐ข๐ง๐ + ๐๐ซ๐๐๐๐ฌ๐ญ๐จ๐ง๐ ๐๐๐ ๐๐จ๐ซ๐ โ lower intake temps = denser air = more powerโฃ
โข ๐-๐ฉ๐จ๐ซ๐ญ ๐๐๐ โ fine-tuned boost control for better responseโฃ
โข ๐๐
๐ ๐๐๐๐ ๐๐ฑ๐ญ๐๐ซ๐ง๐๐ฅ ๐ฐ๐๐ฌ๐ญ๐๐ ๐๐ญ๐ โ helps control boost pressureโฃ
โฃ
๐น๐๐๐๐๐๐ & ๐๐๐๐๐๐๐๐๐๐ ๐๐๐๐๐
๐๐๐๐๐๐๐๐๐โฃ
โข ๐๐๐ฆ๐จ๐ง๐ ๐๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐ซ๐๐๐ซ & ๐๐ซ๐ข๐ฏ๐๐ซ-๐ฌ๐ข๐๐ ๐ฆ๐จ๐ฎ๐ง๐ญ๐ฌ โ reduced engine movement and improves shifting and feelโฃ
โข ๐๐๐ฆ๐จ๐ง๐ ๐๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐๐๐ ๐๐๐ฅ๐๐ญ๐ โ cleaner, more efficient engine operationโฃ
โข ๐๐ข๐ฆ๐ข๐ง๐ ๐๐ก๐๐ข๐ง ๐ค๐ข๐ญ & ๐๐ซ๐๐ฌ๐ก ๐ฌ๐ฉ๐๐ซ๐ค ๐ฉ๐ฅ๐ฎ๐ ๐ฌ โ crucial for long-term reliabilityโฃ
โข ๐๐๐๐๐จ๐ฑ โ improved shifting & launch controlโฃ
โฃ
Everything was installed and custom-built in-house to ensure top-tier quality and performance. Then tying these all up with a custom methanol tune from Cyborg Performance
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If youโre looking to upgrade, service, or maintain your Mazdaspeed, weโve got the experience to make it happen. DM us to get started!โฃ
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27/12/2024
Merry Christmas and a Happy New Year ! Just a quick reminder that we are currently closed and will be back on the 6th of January.
We appreciate all your support throughout this year and canโt wait to do it again in 2025. Til then, we hope you have a festive, restful and fun holiday break!
Weโre still contactable for any questions or queries via social media and email, and are taking bookings for next year.
Stay safe and have a good one! ๐๐
25/09/2024
New to Mazdaspeed and looking to get started with mods? Hereโs a rundown of the first power mods you should consider:
Upgraded Fuel Pump Internals
Mazdaspeed engines are notorious for having high-pressure fuel pump (HPFP) limitations, especially when you start adding power. Upgrading the fuel pump internals is a must if youโre tuning your car. This upgrade ensures your engine gets the fuel it needs, especially at higher RPMs.
3.5โ Air Intake
A cold air intake is one of the most popular mods for good reason. It improves airflow, giving you a noticeable bump in throttle response and power. Plus, it adds that sweet spooly sound! Go custom to ensure quality fitment and gains.
Upgraded Intercooler
The stock intercooler does a decent job, but once you start pushing for more power, heat becomes an issue. A front-mount intercooler will help keep those intake temperatures down, ensuring your engine breathes cooler, denser air. This is crucial for maintaining performance, especially during hot summer drives or track days.
Downpipe and Exhaust
Opening up the exhaust is one of the best ways to free up some extra power. A high-flow downpipe reduces backpressure, allowing the turbo to spool quicker and making your Mazdaspeed feel more responsive. Pair it with a cat-back exhaust for an aggressive sound that matches the new performance.
Rear Motor Mount
The stock mount is known to be a weak spot, causing excessive engine movement, wheel hop, and sloppy shifts. Swapping it out for an upgraded mount improves power delivery, reduces vibrations, and tightens up the overall driving feel. Plus, itโs a relatively easy install.
One Step Colder Spark Plugs
Itโs a simple and affordable upgrade that helps avoid pre-ignition, and supports higher boost levels. Perfect for anyone planning to add more power down the line.
*The plugs will need to be gapped to avoid misfire.
ECU Tuning
If thereโs one mod that can transform your Mazdaspeed, itโs a proper tune. Tuning is required for a larger intake and a downpipe. While you may not necessarily need a tune after adding parts, itโs important to remember these 2 things: when youโre modifying a car that changes the amount of air going into or leaving the engine; or altering any aspect of the fuel system, then you will need a tune.
The best part about modding your Mazdaspeed is that each upgrade makes the car feel more personal and exciting to drive. Start with these foundational mods, and youโll be well on your way to turning your Mazdaspeed into the most enjoyable version of itself. Remember, each mod works best when paired with the right tune, so take your time, enjoy the process, and make sure youโre getting the most out of every upgrade.
Still time left to score yourself 15% off all GFB products!
Offer ends midnight 30th September.
04/09/2024
Zyanโs Speed6 has been a long project but left the workshop with heaps of performance upgrades including some custom fabrication work. We started off with a full checkover to make sure we tackle any potential problems before they become serious, then went on with the following list ๐๐ฝ
CUSTOM FABRICATION:
๐ค Exhaust Manifold
๐ค Donwpipe
๐ค 4โ Air Intake
๐ค Wastegate Screamer Pipe
๐ค Battery Bracket
EXISTING PARTS MOD:
๐ค I/C Piping for new turbo placement
๐ค Race pipe section
๐ค BOV blanking plug
๐ค Battery tray to suit smaller battery
PARTS:
๐ค 3-Port EBC
๐ค Heat Shield
๐ค Clutch Master Cylinder
๐ค Drive Belt
๐ค One-step Colder Spark Plugs
๐คTurbo & Coolant Lines
๐๏ธ .2xtra
Hear the sound of these cars come to life with just an axle~back exhaust, all custom-made and installed.
DM us if you want some noise ๐ข
12/06/2024
Adding a bit of rumble to this BMW with a custom axle~back exhaust โ ๏ธ
Wanting to make your car sound aggressive or achieve a particular tone? Letโs have a chat and we can make it happen.
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Telephone
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Address
62A Hillside Road, Glenfield
Auckland
0627
Opening Hours
| Monday | 9am - 6pm |
| Tuesday | 9am - 6pm |
| Wednesday | 9am - 6pm |
| Thursday | 9am - 6pm |
| Friday | 9am - 6pm |