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Description
Bilstein B6 69-83 Chevrolet Malibu Front 46mm Monotube Shock AbsorberBuick Century 1981 1973; Regal 1987 1975; Cadillac Seville 1979 1976; Chevrolet Chevelle 1973; El Camino 1987 1973; Malibu 1983 1973; Monte Carlo 1988 1973; Nova 1974 1973; Dodge D50 1982 1979; Ram 50 1991 1983; GMC Caballero 1986 1978; Sprint 1977 1975; Oldsmobile Cutlass 1981 1973; Cutlass 1987 1985; Cutlass Calais 1984 1978; Cutlass Cruiser 1983 1980; Cutlass Salon 1981 1975; Cutlass Salon 1987 1985; Cutlass Supreme 1987 1973; Cutlass Tiara 1976;
Buick Century 1981-1973; Regal 1987-1975; Cadillac Seville 1979-1976; Chevrolet Chevelle 1973; El Camino 1987-1973; Malibu 1983-1973; Monte Carlo 1988-1973; Nova 1974-1973; Dodge D50 1982-1979; Ram 50 1991-1983; GMC Caballero 1986-1978; Sprint 1977-1975; Oldsmobile Cutlass 1981-1973; Cutlass 1987-1985; Cutlass Calais 1984-1978; Cutlass Cruiser 1983-1980; Cutlass Salon 1981-1975; Cutlass Salon 1987-1985; Cutlass Supreme 1987-1973; Cutlass Tiara 1976; Pontiac Bonneville 1986-1982; Grand Am 1975; Grand Am 1980-1978; Grand Prix 1987-1975; LeMans 1981-1975
Installation InstructionsWarranty
Material Safety Data Sheet
Material Safety Data Sheet
Installation Instructions
Warranty
Technical Drawing
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1975-1977,1980-1981 | Buick | Century | Base |
| 1975-1979 | Buick | Century | Custom |
| 1976 | Buick | Century | Indianapolis 500 Pace Car |
| 1978-1981 | Buick | Century | Limited |
| 1973-1975 | Buick | Century | Luxus |
| 1975-1979 | Buick | Century | Special |
| 1978-1981 | Buick | Century | Sport |
| 1975-1987 | Buick | Regal | Base |
| 1987 | Buick | Regal | GNX |
| 1984-1987 | Buick | Regal | Grand National |
| 1978-1987 | Buick | Regal | Limited |
| 1982 | Buick | Regal | Limited Turbo |
| 1978-1982 | Buick | Regal | Sport |
| 1976-1977 | Buick | Regal | SR |
| 1983-1986 | Buick | Regal | T-Type |
| 1976-1979 | Cadillac | Seville | Base |
| 1978-1979 | Cadillac | Seville | Elegante |
| 1977-1978 | Cadillac | Seville | Opera |
| 1973 | Chevrolet | Chevelle | Deluxe |
| 1973-1977 | Chevrolet | Chevelle | Malibu |
| 1974-1977 | Chevrolet | Chevelle | Malibu Classic |
| 1974-1976 | Chevrolet | Chevelle | Malibu Classic Estate |
| 1973 | Chevrolet | Chevelle | Malibu Estate |
| 1973-1987 | Chevrolet | El Camino | Base |
| 1975-1977 | Chevrolet | El Camino | Classic |
| 1977-1978,1981-1986 | Chevrolet | El Camino | Conquista |
| 1973-1974 | Chevrolet | El Camino | Custom |
| 1979-1981 | Chevrolet | El Camino | Royal Knight |
| 1973-1987 | Chevrolet | El Camino | SS |
| 1978-1981 | Chevrolet | Malibu | Base |
| 1978-1983 | Chevrolet | Malibu | Classic |
| 1978-1980 | Chevrolet | Malibu | Classic Estate |
| 1978-1981 | Chevrolet | Malibu | Classic Landau |
| 1979-1980 | Chevrolet | Malibu | Classic Sport |
| 1979-1980 | Chevrolet | Malibu | Estate |
| 1979 | Chevrolet | Malibu | Landau |
| 1979 | Chevrolet | Malibu | Police |
| 1979-1980 | Chevrolet | Malibu | Sport |
| 1973-1974,1979,1981-1988 | Chevrolet | Monte Carlo | Base |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1973-1974,1976,1978-1981 | Chevrolet | Monte Carlo | Landau |
| 1986-1988 | Chevrolet | Monte Carlo | LS |
| 1973,1975-1977 | Chevrolet | Monte Carlo | S |
| 1978,1980 | Chevrolet | Monte Carlo | Sport |
| 1983-1988 | Chevrolet | Monte Carlo | SS |
| 1973-1974 | Chevrolet | Nova | Base |
| 1973-1974 | Chevrolet | Nova | Custom |
| 1979-1980 | Dodge | D50 | Base |
| 1981-1982 | Dodge | D50 | Custom |
| 1981-1982 | Dodge | D50 | Royal |
| 1979-1982 | Dodge | D50 | Sport |
| 1987-1991 | Dodge | Ram 50 | Base |
| 1983-1989 | Dodge | Ram 50 | Custom |
| 1990-1991 | Dodge | Ram 50 | LE |
| 1990-1991 | Dodge | Ram 50 | SE |
| 1985-1989 | Dodge | Ram 50 | Sport |
| 1981-1986 | GMC | Caballero | Amarillo |
| 1978-1986 | GMC | Caballero | Base |
| 1981 | GMC | Caballero | Conquista |
| 1978-1986 | GMC | Caballero | Diablo |
| 1978-1980 | GMC | Caballero | Laredo |
| 1981 | GMC | Caballero | Royal Knight |
| 1975-1977 | GMC | Sprint | Base |
| 1975-1977 | GMC | Sprint | Classic |
| 1975 | GMC | Sprint | High Sierra |
| 1976 | GMC | Sprint | Sierra Madre Del Sur |
| 1975-1976 | GMC | Sprint | SP |
| 1975,1977 | Oldsmobile | Cutlass | 442 |
| 1973-1975,1980 | Oldsmobile | Cutlass | Base |
| 1980-1981 | Oldsmobile | Cutlass | Brougham |
| 1977 | Oldsmobile | Cutlass | Colonnade |
| 1976-1977 | Oldsmobile | Cutlass | Colonnade S |
| 1980-1981 | Oldsmobile | Cutlass | LS |
| 1973-1977 | Oldsmobile | Cutlass | S |
| 1976-1979 | Oldsmobile | Cutlass | Vista Cruiser |
| 1979 | Oldsmobile | Cutlass | Vista Cruiser Brougham |
| 1978-1984 | Oldsmobile | Cutlass Calais | Base |
| 1983-1984 | Oldsmobile | Cutlass Calais | Hurst |
| 1980-1983 | Oldsmobile | Cutlass Cruiser | Base |
| 1980-1981 | Oldsmobile | Cutlass Cruiser | Brougham |
| 1978-1979,1985-1986 | Oldsmobile | Cutlass Salon | 442 |
| 1975-1980,1985-1987 | Oldsmobile | Cutlass Salon | Base |
| 1978-1980 | Oldsmobile | Cutlass Salon | Brougham |
| 1979 | Oldsmobile | Cutlass Salon | Hurst |
| 1987 | Oldsmobile | Cutlass Supreme | 442 |
| 1973-1987 | Oldsmobile | Cutlass Supreme | Base |
| 1977-1987 | Oldsmobile | Cutlass Supreme | Brougham |
| 1976-1977 | Oldsmobile | Cutlass Supreme | Colonnade |
| 1974-1975 | Oldsmobile | Cutlass Supreme | Cruiser |
| 1975 | Oldsmobile | Cutlass Supreme | Hurst |
| 1981,1985 | Oldsmobile | Cutlass Supreme | LS |
| 1976 | Oldsmobile | Cutlass Tiara | Base |
| 1983-1986 | Pontiac | Bonneville | Base |
| 1982-1986 | Pontiac | Bonneville | Brougham |
| 1984-1986 | Pontiac | Bonneville | LE |
| 1975,1978-1980 | Pontiac | Grand Am | Base |
| 1976-1987 | Pontiac | Grand Prix | Base |
| 1981-1987 | Pontiac | Grand Prix | Brougham |
| 1984-1987 | Pontiac | Grand Prix | LE |
| 1975,1977-1983 | Pontiac | Grand Prix | LJ |
| 1975-1980 | Pontiac | Grand Prix | SJ |
| 1975-1981 | Pontiac | LeMans | Base |
| 1975-1977 | Pontiac | LeMans | Sport |
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4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 4
Great for what it does but not a miracle
Style: 30 sqft
Sticks well. Definitely thicker and nicer than the Kilmat version. If I were buying again I would just buy more of this, the value is better even though you get less total coverage per pack.
Can be cut to size easily, we used a box cutter which got a little gummed but but not too bad. we were able to get it in and around everywhere we needed to put it and it held up well as we were mashing it into weird spots. It doesnt smell hardly at all while being applied and once its on there is no smell whatsoever The product is great for what it is. 4 stars only because I think it gets oversold for how much this alone can do. We did notice a slight reduction in noise but nowhere near the multiple decibels we see claimed everywhere. If your vehicle is mostly quiet but just has that little bit getting through this will probably do wonders, If you have a vehicle where there's significant engine noise in the cabin you'll need more than just this to bring that down.
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Reviewed in the United States on September 12, 2025
★★★★★ 5
Great product!
Style: 30 sqft
I can say this product makes a huge difference with road noise and is cleaner and easy to work with when applying compared to other mats that cost about the same price.
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Reviewed in the United States on February 14, 2026
★★★★★ 5
Very heavy and thick
Style: 30 sqft
I purchased mini brands of sound ending and this is by far the heaviest sound deadening I've ever ordered. I'm not installed yet but I have a good feeling that is going to work exceptionally in blocking sound. If weight is a concern for you I would recommend a lighter product however if sound quality and a quiet ride is your priority this is the one for you.
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
Model: SLH20025
I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed.
Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands.
Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application.
I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in.
My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined.
If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do.
Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat.
Update Nov, 2025
After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation
Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture
I used it on four vehicles now and have I have not been paid to review and purchased every order myself.
3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
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Reviewed in the United States on September 29, 2025
★★★★★ 5
Top quality
Model: SLH20025
This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels.
After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell.
At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
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Reviewed in the United States on February 15, 2026