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- USA
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
Synchrotech 1st/2nd Brass Synchro - K-seriesSynchrotech 1st or 2nd replacement brass synchro for K series K20A A2 Z1 6 speed transmissions. Features Premium replacement for OEM brass synchros Improved lock angle Updated tooth pattern 1 individual 3pc brass synchro K20A A2 Z1 transmission compatibility 1st or 2nd gear 01 06 JDM EP3 Civic Type R (K20A) 01 05 JDM DC5 RSX Type R (K20A) 02 06 RSX Type S (K20A2 Z1) Please note: Synchrotech parts cannot be canceled returned or exchanged.
Synchrotech 1st or 2nd replacement brass synchro for K-series K20A/A2/Z1 6-speed transmissions.
Features
- Premium replacement for OEM brass synchros
- Improved lock angle
- Updated tooth pattern
- 1 individual 3pc brass synchro
K20A/A2/Z1 transmission compatibility
-
1st or 2nd gear
01-06 JDM EP3 Civic Type-R (K20A)
01-05 JDM DC5 RSX Type-R (K20A)
02-06 RSX Type-S (K20A2/Z1)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.9 ★★★★★
Based on 1267 reviews
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Product Reviews
★★★★★ 5
My new favorite shirts!
Fit Type: Regular Fit, Color: Grey, Size: Large
These are my new favorite shirts! I just ordered a 3rd. i wish there were more colors. Yes, the cotton is heavy-weight and I like that. They are just a bit warmer than regular dress shirts. The fit is excellent. I'm 5'9", 200lbs and L fits perfectly. Enough room without being blousy. The sleeves are long enough (finally!). (Most other 16.5/32-33 shirts always have sleeves that are too short). The fit/finish and detail is surprisingly good. They don't really shrink after washing and come out very soft. Not wrinkle-free, but that's ok since it means that the 100% cotton hasn't been dosed with chemicals. I expect they will wear very well over time.
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Reviewed in the United States on May 5, 2025
★★★★★ 5
A perfect white work shirt.
Fit Type: Regular Fit, Color: White, Size: Medium
Thick, durable, iron exquisitely and the fit is spot on. Perfect white work shirt. I have a grey shirt too, the quality is the same.
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Reviewed in the United States on March 4, 2026
★★★★★ 3
Right fit
I love this shirt it was nice and bright when I got it after a few wash it started to fade out a bit was a perfect fit for a medium built person 5’7 I still would recommend this product they are really nice and thick
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Reviewed in the United States on September 14, 2025
★★★★★ 5
Quality shirt. Not too blousy.
I'm 5'11" and hover around 175-180 lbs. so I'm a pretty average guy. I've been thin my whole life but now I'm in my 40's so if I don't watch it, my stomach will get bigger. I bought this shirt in slim-fit first. It was perfect but since these shirts are 100% cotton, I was concerned that after a couple washings, it would be too small (especially in the stomach area). I returned the slim-fit and bought this regular-fit (medium).
For this review, I thought it would be helpful to compare the Amazon Essentials shirt to The Gap's regular oxford shirt.
I've always liked the fit of Gap oxford shirts. Upon inspection, the weight and feel of the Amazon oxford cloth is exactly the same at the Gap's.
I laid one of my old Gap shirts on top of this Amazon Essentials oxford. You can see from the pictures that the torso cut is exactly the same (about 21 inches pit-to-pit seam). I like that. I'm not a fat guy and I don't want a blousy shirt. This is neither too blousy nor too slim. Just right. The sleeves are perhaps 1/2 inch longer than the Gap shirt. Perhaps one negative is the tail. The Amazon Essentials tail is 1.5-2" longer than the Gap shirt. This makes the Amazon Essentials shirt a touch long for wearing untucked in my opinion. However, if you do tuck, a longer shirt stays tucked-in. So it depends how you want to wear it. I have a lady who does alterations. She'll charge $10 to shorten the tail if I wanted that. If I do have the Amazon shirt altered, it would still be a bargain. These are good quality shirts with a nice cut to them. I won't hesitate to buy them again. Highly recommended.
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Reviewed in the United States on January 24, 2020
★★★★★ 4
Decent quality. Sizing is normal but a bit generous in the midsection
Fit Type: Regular Fit, Color: White, Size: Large
I was impressed. Shirt is of fairly decent quality- thick cotton. My husband is normally a large. Given the sizing chart we almost ordered a medium, but it was good we bought a large. The sleeves are perfect but afraid it may shrink in the dryer. I think the reason people say loose fit is because it is boxy (square). Fine under a suit and we needed it urgently.
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Reviewed in the United States on January 17, 2026
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