STM Tuned Promo Codes and Coupons September 2025

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STM Tuned

STMT Tuned is an online fashion retailer specializing in trendy women's clothing and accessories. The brand focuses on contemporary streetwear and casual fashion at accessible price points, targeting young fashion-conscious consumers. They offer worldwide shipping and regularly update their collection with new styles.

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Today's STM Tuned discount codes

TOP PICK
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20% off

1007 uses
high

worked about 1 month ago

20% Off Stm Closeout Deals at STM Tuned
STM Tuned logo

5% off

8 uses
medium

worked 6 months ago

Score 5% off with promo code
STM Tuned logo

5% off

6 uses
medium

worked 6 months ago

Take 5% off with discount code
STM Tuned logo

15% off

1 uses
medium

worked 6 months ago

Take 15% off with discount code

Featured STM Tuned Products

FP Evo 9 71HTA CHRA Super Core (2001020)

FP Evo 9 71HTA CHRA Super Core (2001020)

The FP 71HTA CHRA Super Core is the best "+1" turbo upgrade for your Evo 8/9 project on a budget. This super core bolts into your stock Evo 9 turbine housing so you're ready to make more power with minimal work!For Evo 8 Install:This is based on an Evo 9 CHRA so if you're putting it in your Evo 8 you will need to purchase the FP Evo 4-8 Turbo Install Kit. Get the divided inlet gasket for MHI housing and the oil line for journal bearing turbo.For Evo 9 Install:This is a direct fit to oil and water lines if you already have an Evo 9 turbo.Includes:Compressor housing and wheel as pictured.This is not a full turbo.You must assemble this to your stock Evo 9 turbo.Shipping Time: (8-10 Weeks) FP Turbos are built to your spec. These are not in stock. Typical wait time has been 8-10 weeks. Evo 9 71HTA CHRA Specs: Compressor Wheel 71HTA Flow Rating 51LB per minute CW Measurements 51.2MM Inducer / 68MM Exducer TW Measurements 55.9MM Inducer / 49MM Exducer Compressor Housing 84MM Flow Advancement Port Cover CHRA FP Journal Bearing FP Part Number 2001020 See more Forced Performance Products

USD 1249.00

STM 4G63 Evo DSM Timing Belt Cam Alignment Tool

STM 4G63 Evo DSM Timing Belt Cam Alignment Tool

The redesigned STM 4G63 cam alignment tool features an open center with pointers to help locate the timing marks on your DSM cam gears.  While its a subtle change to the old tool, it certainly helps ensure things are timed correctly the first time around.  This tool works with all 4G63 1G/2G DSM, GVR4 and Evolution 1-9 models.  Please note that the pointers are only for DSM's.  Evo Cam gear marks point up and align with the valve cover.Vehicle Fitment:Mitsubishi 4G63/4G63T1992-2006 Evolution I-IX1990-1999 Eclipse GST/GSX1990-1998 Talon TSi1990-1994 Laser RS1991-1992 Galant VR4Features:• Billet Aluminum• Hard Anodized for long life against corrosion• Might work as a bottle opener too• Compatible with all 4G63 (DSM & Evo)• USA Made• Lifetime Warranty on STM Parts to the original purchaser against manufacturing defectsIncludes:(1) ToolInstall Notes:While you're at it, you might also want one of the STM Timing Belt Preload Eccentric Pulley ToolUpdated Nov 2024:Now machined in-house at STM and features pointers to help alignment. See more STM Products

USD 35.00

Mitsubishi OEM Evo 9 JDM Taillights (Black Chrome)

Mitsubishi OEM Evo 9 JDM Taillights (Black Chrome)

Genuine OEM Mitsubishi JDM Evo IX tail lights fit all Evo 7/8/9 CT9A models. Available as the set or individually as needed. These taillights have a black chrome housing. The finish inside the housing is a glossy metallic black as pictured. Sold as the pair or individually as needed.Vehicle Fitment:2001-2006 Mitsubishi Evolution VII VIII IXLeft Hand vs Right Hand?LH and RH is determined by driver position. From the driver seat, which side is the light on? Mitsubishi Part Number: Diagram PNC: Vehicle Fitment: 8330A119  80320L LH Side Evo 7/8/9 8330A120  80320R RH Side Evo 7/8/9 See more OEM Mitsubishi Parts

USD 1050.00

Omni Power MAP Sensor for Honda B/D/H/F Series

Omni Power MAP Sensor for Honda B/D/H/F Series

Omni Power MAP sensors for Honda/Acura B, D, H and F series are available in 2.5, 3, 4 and 5 Bar. These sensors have a black case and each is clearly labeled 3BAR, 4BAR or 5BAR. This is not a stock replacement sensor, you will need to have your car tuned.Tune Required:These MAP sensors will require a tune. This is not a stock replacement sensor.Vehicle Fitment:Honda Civic 88-00 (All)Honda Accord 94-02 (All including V6)Honda CRV 97-01 (All)Honda Del Sol 93-97 (All)Honda Odyssey 95-01 (All)Honda Prelude 92-01 (All)Honda S2000 00-05 (All)Acura CL 97-99 (All)Acura CL 01-03 (V6 Only)Acura TL 99-03 (All)Acura Integra 90-01 (All)Acura Integra 90-93 will require 94+ throttle body)Includes:(1) Sensor Part Numbers: Sensor: MAP-BDHF-2.5BRMAP-B-2.5BR 2.5 Bar MAP Sensor MAP-BDHF-3BRMAP-B-3BR 3 Bar MAP Sensor MAP-BDHF-4BRMAP-B-4BR 4 Bar MAP Sensor MAP-BDHF-5BRMAP-B-5BR 5 Bar MAP Sensor More from Omni Power:Omni Power USA MAP (Manifold Absolute Pressure) sensors use state of the art bipolar op amp circuitry with thin film resistor networks built into each micro chip.Pressure changes are calculated on a true linear 0-5 volt scale via a specially designed silicon pressure sensor that also compensates for temperature changes. The unique ability to compensate for temperature changes allows the Omni Power USA MAP sensor to remain a minimum of 99% accurate from 32°F to 180°F through out its range of scale.With the true linear pressure vs. voltage scale there is never a need to re-tune at different altitudes as with other sensors. Competitors sensors on the market don't have true linear scaling which can cause your engine to go out of tune with elevation changes, often resulting in idle problems, poor drivability, and catastrophic engine damage. Omni Power 4 bar MAP sensors can precisely calculate boost pressure from 1-43+ psi (7 bar 1-80+ psi,) while still allowing smooth stock OEM drivability at any boost level. Conveniently packaged in an OEM dimensional housing for easy install and an OEM look.Features:• Cases are designed to withstand in excess of 130 PSI without leaking• -40 to 260° Fahrenheit temperature operating range• Able to respond from 10% of the pressure scale to 90% of the pressure scale in .001 seconds (the fastest response time of any MAP sensor on the market)• Automatic temperature compensation• True linear scaling for perfect drivability at all boost and vacuum levels• Compatible with all aftermarket engine management systems• Minimum of 99% accurate over full scale range under all conditions including temperature, altitude, and humidity changes• Allows smoother engine operation, higher boost levels, and better drivability than competitors turbo MAP sensors• Direct plug and play for an easy install and an OEM look. Dimensionally identical to the stock MAP sensor• Each sensor is hand assembled, pressure, and function checked in the USA for unparalleled quality control prior to shipping

USD 119.99

What STM Tuned coupons are available today?

We track so many discount codes. Read about today's STM Tuned coupon statistics.

18
STM Tuned deals available today
1
Active STM Tuned codes
20% off
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Note: Our community tests every STM Tuned promo code and shares results in real-time. Check success rates and shopping tips in the activity feed to find what works best for your purchase.
STM Tuned logo

20% off

3 uses
medium

worked 6 months ago

Take 20% off with discount code
STM Tuned logo

5% off

105 uses
low

worked 8 months ago

5% Off Storewide at STM Tuned
STM Tuned logo

10% off

766 uses
low

worked 8 months ago

10% Off Stm 925 Lightweight Battery Kit For Evo at STM Tuned
STM Tuned logo

10% off

584 uses
low

worked about 1 year ago

10% Off Storewide at STM Tuned

More STM Tuned Products

S90 Billet Aluminum Throttle Body for 1G/2G DSM & Evo 1/2/3

S90 Billet Aluminum Throttle Body for 1G/2G DSM & Evo 1/2/3

The S90 direct bolt-on throttle body for Evo 1/2/3 and 1G/2G DSM is precision CNC machined from AL6061 T6 billet aluminum for increased durability. Available with a 70mm or 74mm bore size and includes a new gasket and mounting hardware.Vehicle Fitment:1990-1999 Eclipse GST/GSX1990-1998 Talon TSi1990-1994 Laser RSCD9A Evolution ICE9A Evolution II IIIMore Info:The throttle shaft and blade assembly are CNC machined from AL7075-T6 aluminum separately to increase horsepower and torque by optimizing airflow to the engine, with the addition of two high quality bearings for smoother and precision control.Includes:• S90 Throttle Body• Gasket• Install HardwareInstall Notes:• The factory FIAV (Fast Idle Air Valve) parts can be installed to the bottom of the throttle body, but if you want to block off your FIAV, the gasket and block off plate are available here: STM FIAV Block Off Plate and Gasket • We recommend a 3" coupler for the 70/74mm throttle bodies. The 3" coupler is just a bit loose on the 70mm, but a 2.75" is way too small. The 3" coupler is VERY tight on the 74mm, but it does fit. A 3.25" coupler on the 74mm is way too big. Shop for Couplers and Clamps Throttle Body Bore Size: Part Number: 70mm S90-MIT-170 74mm S90-MIT-174 See more S90 Performance Products

USD 249.00

JMF Race Intake Manifold for 2G DSM & Evo 1-3

JMF Race Intake Manifold for 2G DSM & Evo 1-3

The JMF 2G DSM and Evo 1/2/3 "RACE" version intake manifold is for the daily driven weekend race warriors who want the best of both worlds, more HP without sacrificing a lot of spool and street-ability. With over 10 years of proven results, the JMF budget friendly "RACE" version intake manifold is the best bang for your buck! Features a CNC machined billet runner section that bolts to the plenum for modular functionality. Expected gains can be anywhere from 10-45 HP based on your setup and tuning.Vehicle Fitment:1995-1999 Eclipse GST/GSX1995-1998 Talon TSiCD9A Evolution ICE9A Evolution II-IIINOS Provisions:NOS provisions now come standard with the JMF intake manifold. They can be left alone or drilled and tapped for use.Features:• Made form 6061-T6 aircraft quality aluminum• CAD designed• CNC machined billet runner section• Modular design for cost effective upgrades• CNC machined velocity stacks• Tapered runners• Inset plenum to virtually eliminate any chance of plenum failure from high boost/NOS• O-ring'd head flange eliminates the need for a gasket• 5 port vacuum plate with 1/4" NPT threads• NOS provisions standard• Several throttle body flange options availableIncludes:(1) RACE Version Intake Manifold(2) 3/8" brass hose barb(1) 1/4" brass hose barb(1) 1/8" brass hose barb(1) 1/4" NPT brass plug Install Notes:Some modifications to your coil pack mounts and upper intercooler pipes may be needed as this manifold sits down a lot lower than stock. If using the Accufab and other aftermarket throttle bodies please note that the throttle cable and TPS sensors may need modifying. If you need additional vacuum ports, the JMF Vacuum Distribution Block is a great option for up to 6 more ports. Purchase Includes:(1) ManifoldShipping Times:JMF manifolds are built to order. Please allow 1-2 weeks for fabrication and shipping.Discounts:We are sorry, discount codes are not available with this product. See more JMF Products

USD 691.67

GReddy Carbon Fiber Hood Damper for 05-07 WRX/STi (18560101)

GReddy Carbon Fiber Hood Damper for 05-07 WRX/STi (18560101)

The GReddy Carbon Fiber Hood Dampers for 2005-2007 Subaru WRX and STi models are designed with high-end Carbon Dampers and locking ball joint/cup mounts to give you a smooth opening and closing operation. These dampers are intended for use with a factory or OEM weight hood. Installation is also made very easy with English instructions and labeled mounts for both the hood and fender.Vehicle Fitment:2005-2007 Subaru WRX 2005-2007 Subaru STiInstall Notes:• Designed for OEM weight hoods.• Use with aftermarket hoods is not recommended.Includes:(2) Carbon Fiber Dampers with Install Hardware See more GReddy Products

USD 313.50

GReddy Oil Filter/Cooler Relocation Adapter (12401114)

GReddy Oil Filter/Cooler Relocation Adapter (12401114)

GReddy's GREX Type-I O/C remote oil filter relocation adapter is ideal for custom oil cooler kits with oil filter relocation. A built-in thermostat allows the engine to warm to a preset temp, then open up and flow oil to the oil cooler. Purchase Includes:Filter block with fittings as pictured. Fitment:for 3/4" x 16UNF Oil Filters GReddy Thermostat:70-80°C *IMPORTANT*(12009990) *optional -10AN bypass tube if no oil cooler is used.Oil outlet and inlet for the oil cooler mustbe looped back. Ideally to used with -10 AN Oil Block Adapter to engine without thermostat:M20 x P1.5 (12401129)3/4 x 16UNF (12401111) Type-F:M20 x P1.5 (12401131)3/4 x 16UNF (12401135) GReddy x Taarks Collab. RB-specific Remote Oil Block (12428100).Use (16400721) for 1/8PT ports to use with Pressure & Temperature Sensors.Optional GReddy Direct M18xP1.5 O-ring fittings (1240215X). See more GReddy Products

USD 142.50

STM Tuned logo

10% off

154 uses
low

worked 9 months ago

10% Off Storewide at STM Tuned
STM Tuned logo

5% off

298 uses
low

worked 11 months ago

5% Off Storewide at STM Tuned
STM Tuned logo

10% off

66 uses
low

worked almost 2 years ago

10% Off Hawk Performance Products at STM Tuned
STM Tuned logo

5% off

64 uses
low

worked over 1 year ago

5% Off Storewide at STM Tuned

Sustainability Score

42%
STMT Tuned shows limited transparency regarding their supply chain and manufacturing processes. While they have introduced some recycled materials in their packaging, their overall environmental impact remains concerning. The brand lacks clear policies on labor conditions and animal welfare. Their sustainability commitments appear superficial without substantial evidence of implementation or third-party verification.

About STM Tuned

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FAQs

Major sales typically occur during Black Friday (November), end-of-season clearances (January and July), and occasional flash sales throughout the year. Sign up for their newsletter to get notified about upcoming sales.

The best deals can be found during Black Friday sales and end-of-season clearances. Additionally, shopping mid-week (Tuesday-Thursday) often gives you better access to new arrivals and full size ranges.

Yes, students can receive a 10% discount on full-priced items with valid student ID verification through Student Beans.

Subscribe to their newsletter for exclusive discount codes, follow their social media accounts for flash sales, and check their website banner for ongoing promotions.

In the past month, STM Tuned has launched 0 new promo coupons for shopper discounts. This indicates that STM Tuned does not provide regular opportunities for customers to save money on their purchases.

On average, STM Tuned provides 3.5 discount coupons each month. Based on historical data, the average time between STM Tuned coupon releases every 9 days. However, this rate depends on various factors such as seasonal promotions (Black Friday, Cyber Monday, etc.), product launches, or other marketing initiatives. To stay informed about upcoming discounts and promotions, we recommend checking STM Tuned website regularly, subscribing to email newsletters, and following them on social media.

STM Tuned is offering 1 working store-wide codes, however they are also offering 17 additional discount codes with a best discount of 20% off

terra.coupons is the #1 provider of discount codes for your favorite retailers, such as STM Tuned. As a crowd-sourced platform for coupon codes, we accurate codes for over 10,000 stores. Save time and avoid expired codes by checking terra.coupons for the latest STM Tuned discount codes.

Curated by

Aleksa P.

Aleksa P.

Deal Curator

Last updated September 2025

Aleksa is a deal finder from the tech-savvy city of Austin, Texas. A keen coder by day and a discount guru by night, Aleksa checks back regularly to update you with new deals.

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