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Description
Fits 1980-1986 Chevrolet K20 Straight Through Muffler-Stainless SM11149-JHPRStreet Max, Stainless Straight Through Performance Muffler, 4. 0" x 9. 0" x 14. 0" Oval Body, Aggressive to Moderate Tone, 16 Gauge 409 Grade Stainless Steel, Satin Finish, 2. 25" Center In, 2. 25" Dual Out, Reversible, 3 Year Limited Warranty. Features: Straight Through Design (fully reversible) Improved Horsepower and Torque 409 Grade 16 Gauge Stainless Steel Construction High Heat Thermal Mesh Effective Drone Reduction Aggressive Moderate Tone
Street Max, Stainless Straight-Through Performance Muffler, 4.0" x 9.0" x 14.0" Oval Body, Aggressive to Moderate Tone, 16-Gauge 409-Grade Stainless Steel, Satin Finish, 2.25" Center In, 2.25" Dual Out, Reversible, 3 Year Limited Warranty.
Features:
- Straight-Through Design (fully reversible)
- Improved Horsepower and Torque
- 409-Grade 16-Gauge Stainless Steel Construction
- High-Heat Thermal Mesh
- Effective Drone Reduction
- Aggressive/Moderate Tone
Specs:
| Body Length (IN) | 14 |
|---|---|
| Body Type | Oval |
| Finish | High-Heat Thermal Mesh |
| Inlet Configuration | Center |
| Inlet Diameter (IN) | 2.25 |
| Material | 409-Grade 16-Gauge Stainless Steel |
| Outlet Configuration | Dual |
| Outlet Diameter (IN) | 2.25 |
| Overall Length (IN) | 20 |
| Prop 65 - Short Label | prop65_warning.jpg |
| Prop 65 (C, R or CR) | CR |
| Prop 65 Yes/No | Yes |
| Series | 4 inx9 in Oval |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-1986 | Chevrolet | K20 | |
| 1980-1986 | Chevrolet | K5 Blazer | |
| 1984-1991 | Chevrolet | Corvette | |
| 1984-1989 | Nissan | 300ZX | |
| 1986-1989 | Acura | Integra | |
| 1986-1992 | Toyota | Supra | |
| 1987-1995 | Ford | F-150 | |
| 1988-1995 | Chevrolet | K2500 | |
| 1988-1995 | Chevrolet | K3500 | |
| 1989-2008 | Nissan | Maxima | |
| 1991-1995 | Acura | Legend | |
| 2000-2004 | Volkswagen | Jetta | |
| 2008-2012 | Ford | Taurus | |
| 2014-2019 | Ford | Fiesta | |
| 2014-2022 | Mini | Cooper | |
| 2015-2022 | Subaru | WRX | |
| 2016-2022 | Mazda | MX-5 Miata | |
| 2016-2022 | Mazda | MX-5 |
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
4.7 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
My kid loves them!
My kid loves these. They also said they like that, unlike some other ones, they can see underneath it somewhat to tell when its more ready to come off.
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Love this entire skincare line
We love this product! I have a teenage daughter who uses it and absolutely raves about it. We use the entire line, including the facial cleanser, toner, and more. Everything about these products has been great—effective, gentle, and high quality. Highly recommend!
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Reviewed in the United States on December 18, 2025
★★★★★ 4
Works great, just no different from any other pimple patch on the market
These pimple patches by Thayers are made from 100% hydrocolloid and definitely work in terms of helping speed up the pimple healing process. These pimple patches work best when your pimple is ripe enough. If you stick these pimple patches on when your pimples are not ripe enough yet, they will not do anything, and it would be a waste of a pimple sticker. You know when your pimple is ripe when it comes to a head and has that little white spot. When it's ripe, I would stick this pimple patch overnight and typically by the time I wake up, the pimple patch will have absorbed all the gunk from my pimple. You will know that it worked if you see your pimple patch turn white. Sometimes it might take an extra night for the gunk to come out. When you stick these pimple patches on, make sure your face is freshly washed without any face products or else they won't stick as well. Given what the Thayers brand is known for (natural remedies and herbal extracts), I would think that they would infuse some natural ingredients into this pimple patch to help speed up the healing process even more. But to my disappointment, they did not add any additional active ingredient to this pimple patch despite what their brand stands for so I took off a star.
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Reviewed in the United States on March 6, 2025
★★★★★ 5
Great for my teen
We love Thayers everything. They work so great and they truly are invisible. My daughter can wear them to school and not even realize they’re on her face.
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Reviewed in the United States on November 22, 2025
★★★★★ 5
A MUST Buy for your TEEN.
Helping my son so much - these work within a couple of hours to flatten ouchie whiteheads. My 14 years old son is so grateful!
There’s 2 sizes, 22 patches, and they truly are “invisible” like the box says.
These have been working so well (better than any other brand - and we’ve tried them all) and the price is the cheapest. We Love THAYERS brand now - lifetime user here for sure.
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Reviewed in the United States on July 27, 2025