SKU: 90348391529
straight cut gears

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

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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:
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  • 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: 90348391529

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4.2 ★★★★★
Based on 22 reviews
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Product Reviews
D
Verified Purchase
Dylan Lemox
Waukegan, US
★★★★★ 5
Fantastic Read!
Format: Paperback
🖤”𝑰𝒇 𝒕𝒉𝒆 𝒘𝒐𝒓𝒍𝒅 𝒉𝒂𝒅 𝒕𝒐 𝒃𝒆 𝒕𝒆𝒓𝒓𝒊𝒃𝒍𝒆, 𝑰 𝒄𝒐𝒖𝒍𝒅 𝒃𝒆 𝒔𝒐, 𝒔𝒐 𝒎𝒖𝒄𝒉 𝒘𝒐𝒓𝒔𝒆.”💜 The Death-Made Prince by Lisette Marshall is the perfect enemies to lovers read!😍🐦‍⬛💜 🖋️Review Thraga lives in a world where runewitches are killed for simply existing. Just hours from being sent to the gallows, a mysterious prisoner shows up and sets her on a path she never thought possible. When these two collide, they are never the same. This book is Lisette’s best work yet! I loved the characters, the story, and the romance. The tension between these two characters was palpable and I ATE IT UP!!! Between the fast-paced plot and the witty banter, I couldn't put this one down. The OCD rep in this book was perfection. I loved how Lisette explored grief and overcoming heartache in this one. From the magic system to the Norse lore this book was such a fantastic read. I cannot wait to read book two and explore more of this story and this amazing world the author has created. And that freaking ending!!! 🤯😳🫢 Do not sleep on this book, it has everything you want in a romantasy and more!!! If you enjoy creative magic systems, yearning and tension that will have you melting and kicking your feet, epic action and adventure, or well thought out complex characters, look no further this book is for you!! Genre: Fantasy Romance Publication Date: October 21st, 2025 Series: Runewitch Saga - Book 1 Pages: 545 ⭐️-5 🌶️-2 Tropes: 🐦‍⬛Both MCs are Morally Grey 🗡️Enemies to Lovers 💜OCD Rep 🐦‍⬛Deadly Quest 🗡️Norse Mythology 💜Necromancer & Witch 🐦‍⬛Slow Burn with Spice And More… 🚨⚠️This book has dark elements and is not suitable for all readers. Please be sure to check the trigger warnings before reading this book!⚠️🚨
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 20, 2025
A
Verified Purchase
arienwen
Phoenix, US
★★★★★ 4
An Unforgettable Fantasy Read
Format: Paperback
⭐️3.75/5 stars ⭐️ I can’t, in good faith, talk about this book without mentioning the end. If you are a reader who despises cliffhangers, you might want to add this to your TBR (and you’re going to want to read it) until the sequel is announced, because I am STILL reeling over that ending. This cliffhanger is the cliff that keeps on giving. It’s going to stay with me until the day I get to read Book 2. Why are you going to want to read The Death-Made Prince anyway? First and foremost is the world that Lisette Marshall has created with such a unique and refreshing magic system! I was hooked from the first mention of runes and necromancy. Linguistics is a subject that has always fascinated me, both in reality and in fantasy. Seeing Thraga’s runic witchcraft described as a formulaic language made both my mathematician and reader hearts throb with anticipation. Moreover, I loved Marshall’s take on necromancy - I didn’t realize how literal the “death-made” title for Durlain would be! In The Death-Made Prince, Marshall really does combine a variety of magical elements to create a fantasy world that is hard to leave. But what also makes The Death-Made Prince hard to ignore are the characters. Thraga and Durlain both have their tragic backstories, but it’s what lies beyond their backstories that truly make them stand out. Thraga is a runewitch with OCD and anxiety, and I just have to say that the representation is ON POINT. On the other hand, Durlain is a loveable black cat MMC who tries so hard to be an idiot (and does succeed). While their enemies-to-lovers relationship is a slow, slow, SLOW burn, it makes it all worth it in the “end.” The banter between them is top-notch and had me hooked and invested throughout. There were times when their banter was the only thing that kept me reading. The first 50% was slow and I had some trouble staying invested. BUT, I will encourage any reader who looks at my review to STICK WITH IT. The last 20-30% of the book made it oh so worth it. It really picks up once Durlain and Thraga arrive at the Dawn House (iykyk), featuring secrets, lies, and espionage. Oh, and of course the sexual tension. From then on, the plot moved quickly, and I couldn’t put my Kindle down. And then, there was the cliffhanger. But you already knew that. All in all, The Death-Made Prince introduced a fantasy world that I am loath to leave (even if for a little bit). While the beginning was slow and seemed to drag on, the end was amazing and I do not, and never will, regret reading it. Catch me again when Book 2 is announced… Thank you to Lisette Marshall and the team at Behind the Pages for letting me read an early copy of The Death-Made Prince! I’m honored to give my honest thoughts on this book and support its release.
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Reviewed in the United States on October 19, 2025
S
Verified Purchase
streetbook
Lowell, US
★★★★★ 5
amazing characters
Format: Kindle
These characters were fascinating. They were very damaged but also strong survivors. There was a sarcastic banter between them which I loved. The female lead grew from seeing herself as small but by the end she recognized her many strengths-which she will need to use to escape after a betrayal by the make lead. Best book that I have read in long time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
M
Megan Dodd
Phoenix, US
★★★★★ 3
thorn of mine and in my side
Format: Kindle
This book really was a thorn in my side because I was spite reading until 60% though simply so I didn’t have to DNF it. Look. I read 2-3 books a week and it took me a week and a half to trudge through this. I don’t know why everyone is freaking out about how good it is because it’s not original, it’s boring, is so confusing, and literally put me to sleep more times than I can count. This is a 2.5⭐️ book rounded up because once I made it to 60% there was enough going on that I could follow it and my interest peaked enough to not DNF. I fear for the next book because this one needs work. I still don’t know who is who or what kingdom they belong to. Truly, this was not set up or executed well. I did however, truly love when he started calling her “thorn of mine”. I thought that was toxic cuteness at its finest. But wow, what a mess.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
T
Verified Purchase
T. Helton
Lowell, US
★★★★★ 4
enjoyable read
Format: Kindle
I read a ton of romantasy books. This was one of the better ones I read in the past year. The plot is interesting and not repetitive. The slow burn is satisfying. I like that the heroine finds her voice and power along the way
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026

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