One of One - Custom Auto

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.

22/01/2026

This manifold wasnโ€™t just built to look good, that was a by-product. ๐Ÿ’…๐Ÿป

It was designed for faster boost, better fit, and a setup you canโ€™t buy off the shelf on a Mazdaspeed.

Built for one car and with intent.

DM us if youโ€™re planning a serious build ๐Ÿ“ฒ

18/12/2025

Clean upgrades on this Mazdaspeed6๐Ÿ”ฅscott

Fresh pipes for this โ€˜92 Nissan Laurel ๐Ÿ”ฅ Smooth flow, crisp sound.Swipe ๐Ÿ‘‰๐Ÿป and turn up the volume.
15/10/2025

Fresh pipes for this โ€˜92 Nissan Laurel ๐Ÿ”ฅ
Smooth flow, crisp sound.
Swipe ๐Ÿ‘‰๐Ÿป and turn up the volume.

From Stock to Street-Ready.This Mazdaspeed3 rolled in bone stock. Now itโ€™s breathing, sounding, and pulling like it shou...
09/07/2025

From Stock to Street-Ready.
This Mazdaspeed3 rolled in bone stock. Now itโ€™s 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 biteโ€”aggressive 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 youโ€™re driving a Mazdaspeed and still stock or lightly moddedโ€”this is your sign. These upgrades donโ€™t just wake the car up, they transform the entire driving experience.

๐Ÿ“Ready to upgrade your Speed? Send us a message or drop by the shop. Weโ€™ll build it right, just like we did this one.

๐ŸŽ Pickering

Ever wondered what a K04 turbo inhaling through a 4โ€ intake sounds like? Swipe ๐Ÿ‘‰๐Ÿปfor pure, unfiltered turbo noises strai...
12/03/2025

Ever wondered what a K04 turbo inhaling through a 4โ€ intake sounds like? Swipe ๐Ÿ‘‰๐Ÿปfor pure, unfiltered turbo noises straight from the source ๐ŸŒ๐ŸŽต

Our custom 4โ€ aluminum intake with BOV is designed for max airflow and faster boost recovery on every shift. ๐ŸŒฌ๏ธ

DM us to get yours and let your car breathe freely like it should!

Aarizโ€™s Gen1 [LWKY8U] came in for a full performance transformation, and we delivered! Hereโ€™s a breakdown of the upgrade...
05/03/2025

Aarizโ€™s Gen1 [LWKY8U] came in for a full performance transformation, and we delivered! Hereโ€™s a breakdown of the upgrades that took this build to the next level:โฃ
โฃ
๐Ÿ”น๐“๐”๐‘๐๐Ž & ๐„๐—๐‡๐€๐”๐’๐“ ๐”๐๐†๐‘๐€๐ƒ๐„๐’โฃ
โ€ข ๐’๐œ๐š๐ฅ๐ž๐ฌ ๐’๐ง๐š๐ข๐ฅ๐ฌ ๐†๐“๐—๐Ÿ๐Ÿ—๐Ÿ”๐Ÿ•๐ซ ๐ญ๐ฎ๐ซ๐›๐จ โ€“ faster spool, more powerโฃ
โ€ข ๐‚๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐ญ๐ฎ๐ซ๐›๐จ-๐›๐š๐œ๐ค ๐ž๐ฑ๐ก๐š๐ฎ๐ฌ๐ญ โ€“ improved flow & aggressive soundโฃ
โ€ข ๐—๐’ ๐๐จ๐ฐ๐ž๐ซ ๐ž๐ฑ๐ก๐š๐ฎ๐ฌ๐ญ ๐ฆ๐š๐ง๐ข๐Ÿ๐จ๐ฅ๐ โ€“ better boost responseโฃ
โฃ
๐Ÿ”น๐ˆ๐๐“๐€๐Š๐„ & ๐…๐”๐„๐‹๐ˆ๐๐† ๐„๐๐‡๐€๐๐‚๐„๐Œ๐„๐๐“๐’โฃ
โ€ข ๐‚๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐Ÿ’โ€ ๐ข๐ง๐ญ๐š๐ค๐ž โ€“ maximized airflow for the turboโฃ
โ€ข ๐‚๐จ๐ซ๐ค๐’๐ฉ๐จ๐ซ๐ญ ๐ข๐ง๐ญ๐š๐ค๐ž ๐ฆ๐š๐ง๐ข๐Ÿ๐จ๐ฅ๐ & ๐ญ๐ก๐ซ๐จ๐ญ๐ญ๐ฅ๐ž ๐›๐จ๐๐ฒ โ€“ optimized airflow for power gainsโฃ
โ€ข ๐‡๐๐…๐ ๐ฎ๐ฉ๐ ๐ซ๐š๐๐ž โ€“ essential for fueling under high boostโฃ
โ€ข ๐‚๐ฅ๐ž๐š๐ง๐ž๐ ๐ข๐ง๐ฃ๐ž๐œ๐ญ๐จ๐ซ๐ฌ + ๐Ž๐ฏ๐ž๐ซ๐ฌ๐ฉ๐ž๐ž๐ ๐Œ๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐ข๐ง๐ฃ๐ž๐œ๐ญ๐จ๐ซ ๐ฌ๐ž๐š๐ฅ๐ฌโฃ
โฃ
๐Ÿ”น๐‚๐Ž๐Ž๐‹๐ˆ๐๐† & ๐๐Ž๐Ž๐’๐“ ๐‚๐Ž๐๐“๐‘๐Ž๐‹โฃ
โ€ข ๐‚๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐…๐Œ๐ˆ๐‚ ๐ฉ๐ข๐ฉ๐ข๐ง๐  + ๐“๐ซ๐ž๐š๐๐ฌ๐ญ๐จ๐ง๐ž ๐“๐‘๐Ÿ– ๐œ๐จ๐ซ๐ž โ€“ lower intake temps = denser air = more powerโฃ
โ€ข ๐Ÿ‘-๐ฉ๐จ๐ซ๐ญ ๐„๐๐‚ โ€“ fine-tuned boost control for better responseโฃ
โ€ข ๐†๐…๐ ๐„๐—๐Ÿ’๐Ÿ’ ๐ž๐ฑ๐ญ๐ž๐ซ๐ง๐š๐ฅ ๐ฐ๐š๐ฌ๐ญ๐ž๐ ๐š๐ญ๐ž โ€“ helps control boost pressureโฃ
โฃ
๐Ÿ”น๐„๐๐†๐ˆ๐๐„ & ๐ƒ๐‘๐ˆ๐•๐„๐“๐‘๐€๐ˆ๐ ๐‘๐„๐ˆ๐๐…๐Ž๐‘๐‚๐„๐Œ๐„๐๐“๐’โฃ
โ€ข ๐ƒ๐š๐ฆ๐จ๐ง๐ ๐Œ๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐ซ๐ž๐š๐ซ & ๐๐ซ๐ข๐ฏ๐ž๐ซ-๐ฌ๐ข๐๐ž ๐ฆ๐จ๐ฎ๐ง๐ญ๐ฌ โ€“ reduced engine movement and improves shifting and feelโฃ
โ€ข ๐ƒ๐š๐ฆ๐จ๐ง๐ ๐Œ๐จ๐ญ๐จ๐ซ๐ฌ๐ฉ๐จ๐ซ๐ญ๐ฌ ๐„๐†๐‘ ๐๐ž๐ฅ๐ž๐ญ๐ž โ€“ cleaner, more efficient engine operationโฃ
โ€ข ๐“๐ข๐ฆ๐ข๐ง๐  ๐œ๐ก๐š๐ข๐ง ๐ค๐ข๐ญ & ๐Ÿ๐ซ๐ž๐ฌ๐ก ๐ฌ๐ฉ๐š๐ซ๐ค ๐ฉ๐ฅ๐ฎ๐ ๐ฌ โ€“ crucial for long-term reliabilityโฃ
โ€ข ๐–๐Ž๐“๐›๐จ๐ฑ โ€“ improved shifting & launch controlโฃ
โฃ
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
โฃ
If youโ€™re looking to upgrade, service, or maintain your Mazdaspeed, weโ€™ve got the experience to make it happen. DM us to get started!โฃ
โฃ
โฃ

Merry Christmas and a Happy New Year ! Just a quick reminder that we are currently closed and will be back on the 6th of...
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 canโ€™t wait to do it again in 2025. Til then, we hope you have a festive, restful and fun holiday break!

Weโ€™re 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! ๐ŸŽ„๐ŸŽ‰

New to Mazdaspeed and looking to get started with mods? Hereโ€™s a rundown of the first power mods you should consider:Upg...
25/09/2024

New to Mazdaspeed and looking to get started with mods? Hereโ€™s 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 youโ€™re 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, itโ€™s a relatively easy install.

One Step Colder Spark Plugs
Itโ€™s 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 thereโ€™s one mod that can transform your Mazdaspeed, itโ€™s a proper tune. Tuning is required for a larger intake and a downpipe. While you may not necessarily need a tune after adding parts, itโ€™s important to remember these 2 things: when youโ€™re 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 youโ€™ll 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 youโ€™re getting the most out of every upgrade.

25/09/2024

Still time left to score yourself 15% off all GFB products!
Offer ends midnight 30th September.

Zyanโ€™s Speed6 has been a long project but left the workshop with heaps of performance upgrades including some custom fab...
04/09/2024

Zyanโ€™s 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 ๐Ÿ‘‡๐Ÿฝ

CUSTOM FABRICATION:
๐ŸŸค Exhaust Manifold
๐ŸŸค Donwpipe
๐ŸŸค 4โ€ Air Intake
๐ŸŸค Wastegate Screamer Pipe
๐ŸŸค Battery Bracket

EXISTING PARTS MOD:
๐ŸŸค I/C Piping for new turbo placement
๐ŸŸค Race pipe section
๐ŸŸค BOV blanking plug
๐ŸŸค Battery tray to suit smaller battery

PARTS:
๐ŸŸค 3-Port EBC
๐ŸŸค Heat Shield
๐ŸŸค Clutch Master Cylinder
๐ŸŸค Drive Belt
๐ŸŸค One-step Colder Spark Plugs
๐ŸŸคTurbo & Coolant Lines

๐ŸŽ๏ธ .2xtra

16/07/2024

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 ๐Ÿ“ข

Adding a bit of rumble to this BMW with a custom axle~back exhaust โ™ ๏ธWanting to make your car sound aggressive or achiev...
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? Letโ€™s have a chat and we can make it happen.

Address

62A Hillside Road, Glenfield
Auckland
0627

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm

Telephone

+6494413101

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