SKU: 23912965092
straight cut gears

straight cut gears IAG Performance 1st-4th Straight Cut Gear Set

Sale price$25.15 Regular price$27.94
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Ships within 48 hours · Estimated delivery Nov 13 - Nov 18

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Description

straight cut gears IAG Performance 1st-4th Straight Cut Gear Set2004 2021 Subaru WRX STI 1st 4th Straight Cut Gear Set by IAG Performance Gone are the days of blowing up stock six speeds, or having to resort to race only solutions to support the high power levels that built Subarus now produce. The IAG Spec PPG Straight Cut 1 4 Synchro Gear Set is designed for weekend racers (and weekday racers for that matter) who prefer the streetability of a synchronized gearbox which is suitable for daily driving. The kit

2004-2021 Subaru WRX STI 1st-4th Straight Cut Gear Set by IAG Performance

Gone are the days of blowing up stock six speeds, or having to resort to race-only solutions to support the high power levels that built Subarus now produce.

The IAG-Spec PPG Straight-Cut 1-4 Synchro Gear Set is designed for weekend racers (and weekday racers for that matter) who prefer the streetability of a synchronized gearbox which is suitable for daily driving. The kit features strong, straight-cut gears (vs. traditional helical gears) which provide maximum performance and durability for high horsepower Subarus and can be safely driven on the street.

IAG engineers worked directly with PPG to specify custom gear ratios which allowed us to increase top-speed in 1st and 4th gear. This change will prevent extra shifts while drag racing. Additionally, the gearset is designed to utilize the OEM 5th and 6th gears for quiet highway operation and maximize streetability.

While the synchronizers improve drivability for the street, the taller 1st and 4th gears are the stars of the show when it comes to racing and all-out acceleration. A 1st Gear Ratio of 3.077 results in an 8-10 mph increase vs. OEM (years vary) while the new 4th Gear Ratio of 1.042 will ensure that you finish out your quarter mile pass without shifting to 5th.

Sub 10-second street Subarus are all the rage right now. The partnership between IAG and PPG combines our experience to offer a robust but versatile combination that appeals to those who want the strength of a built transmission, but don't want to give up driving the car on the street. Pfitzner’s legendary strength and durability paired with IAG’s insight on gear ratios and specifications has resulted in a product that we know will be a game changer in the Subaru community.

Features

  • Longer Gear Ratios for Less Shifting

Benefits

  • Stronger than OEM to Handling Higher Power Outputs

Applications

  • 2004-2021 Subaru WRX STI

What's In The Box?

  • 1 - Input Shaft
  • 1 - 1st Straight-Cut Output Gear
  • 1 - 2nd Straight-Cut Output Gear
  • 1 - 3/4 Straight-Cut Cluster Gear
  • 1 - 3rd Straight-Cut Input Gear
  • 1 - 4th Straight-Cut Input Gear
  • 1 - Clutch Input Shaft
  • 1 - Reverse Idler Gear
  • 1 - Input Shaft C Clip
  • 1 - Retainer Key

Warranty

  • IAG Performance's Limited Manufacturer's Warranty
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 23912965092

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LisaRose Wright
Houston, US
★★★★★ 5
This is a great basic protective shower curtain
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
This is a great product. It allows me to have a decorative curtain that won’t get water damaged or mildewed. The price point was right on and I will definitely be buying it again. Pros: The thickness is great. Not too flimsy. I was also impressed with the fact that there wasn’t a chemical smell like we often get with plastic curtains. It was very easy to put up and was just the right length to keep the water in the shower while it does a great job protecting the decorative curtain. It also has weights to assist it with hanging correctly. Cons: Make sure to spread it out after your shower to prevent water stains .
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Reviewed in the United States on March 1, 2026
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True-Blue Review
Dallas, US
★★★★★ 5
Serves Purpose.
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
Ok perfect! Although it could be thicker and the holes placement lower to match the curtin holes. I had to adjust the shower bar by lowering so magnets attach. And they may carry a thicker curtain I didn't check.
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Reviewed in the United States on April 29, 2026
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Rome
Massapequa, US
★★★★★ 5
Thicker liner that stays in place and keeps water inside the tub
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1), Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
I replaced my old shower liner with this BigFoot clear liner, and it’s a noticeable upgrade. The material feels thicker than the typical cheap liners, which helps it hang properly instead of sticking to you while showering. The weighted bottom is one of the best features. It keeps the liner in place so water doesn’t leak out onto the floor, even with a strong shower stream. Once it’s set up, it just stays put without constantly needing adjustment. Installation was straightforward with standard hooks, and the reinforced grommets feel durable enough that they won’t tear easily over time. The clear design is also a plus because it keeps the bathroom looking brighter and less closed in. It wipes down easily and so far hasn’t shown signs of mildew, which is important for something that’s constantly exposed to moisture. Pros: • Thicker material than standard liners • Weighted bottom keeps it in place • Reinforced grommets add durability • Clear design keeps bathroom bright Cons: • Slight plastic smell at first (fades quickly) • Still needs occasional cleaning to prevent buildup Overall, this is a simple but well-made shower liner that does exactly what it’s supposed to do. Great upgrade from thinner, cheaper options.
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Reviewed in the United States on March 17, 2026
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Nguyen
Whiting, US
★★★★★ 4
Thick and clear
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
I like that this shower liner is clear, so you can still see the main shower curtain behind it. The magnets at the bottom help give it weight and keep it against the tub, so it doesn't blow around. The material also feels thicker than cheaper liners. So far, it’s been working well.
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Reviewed in the United States on May 11, 2026
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Nancy Whitson
Natrona Heights, US
★★★★★ 5
Durability
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
Great liner for shower.Like the price, easy clean!
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Reviewed in the United States on May 17, 2026

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