The Lined with sound-absorbing cotton system is an integrated interior trim solution for the HOWO MAX 4X2 cab, designed to reduce cabin noise, enhance thermal insulation, and provide a premium appearance. This genuine HOWO kit includes roof linings, side wall linings, handrails, trim rivets, large washers, pan head screws, blanking caps, cushion blocks, and a rear interior panel – all meticulously engineered to fit the MAX 4X2 cab architecture. When you choose authentic Howo Parts, this Lined with sound-absorbing cotton kit guarantees OE fitment, superior noise reduction, and durable trim retention. Below are detailed descriptions of every component included with this Lined with sound-absorbing cotton assembly.
Four roof linings (YZ167461000029, YZ167461000037, YZ167461000038, YZ167461000046) are provided to cover the ceiling area of the cab. These Lined with sound-absorbing cotton components are made from high‑density fibreboard with a foam‑backed fabric covering. The roof lining absorbs engine and road noise, significantly reducing interior sound levels. The material is also lightweight and flame‑retardant, complying with FMVSS 302 standards. Each roof lining is precision‑cut to match the exact contour of the HOWO MAX 4X2 roof, including cutouts for sun visors, interior lights, and overhead storage.
Thirty‑five light grey interior trim rivets are used to secure the roof and side wall linings to the cab structure. These Lined with sound-absorbing cotton rivets are made from nylon 6.6 with a push‑fit design that eliminates the need for tools. They have a wide decorative flange that blends with the interior colour, providing a clean, professional appearance. The rivets are corrosion‑resistant and can be removed and reused multiple times without losing holding power.
Six large washers are supplied in two sizes: four M5 washers (Q402B05F31) and two M8 washers (Q402B08F31). These Lined with sound-absorbing cotton washers are used under the heads of the hexalobular socket pan head screws to distribute clamping load and prevent the fastener from pulling through the lining material. They are made from hardened steel with a zinc‑plated finish, ensuring durability and corrosion resistance.
Multiple Torx pan head screws (Q215B0516F31) are used to attach the roof linings, side linings, handrails, and other trim components. These Lined with sound-absorbing cotton screws feature a Torx drive that provides secure engagement and reduces cam‑out. The screws are self‑tapping, making them suitable for direct installation into the metal frame of the cab. They are made from stainless steel for excellent corrosion protection.
The upper handrail of right door frame is an ergonomic grab handle mounted above the passenger door. This Lined with sound-absorbing cotton component is made from cast aluminium with a soft‑touch textured finish, providing a comfortable grip for entry and exit. It is secured using the supplied Torx screws and large washers.
The right column B handrail blanking cap covers the unused mounting hole for the B‑pillar handrail on the passenger side. This Lined with sound-absorbing cotton cap is made from matching light grey ABS plastic, providing a flush, finished appearance. It snaps into place without tools and can be removed if a handrail is later installed.
The left B pillar armrest plug cover is a cosmetic cap that fills the mounting hole for the driver‑side B‑pillar armrest. This Lined with sound-absorbing cotton cover matches the interior colour and is made from durable ABS plastic. It ensures a clean, professional look on the left side of the cab.
Two upper handrail blanking caps for the right door frame are provided to seal the unused mounting holes when the handrail is not fitted. These Lined with sound-absorbing cotton caps are easy to install and provide a smooth surface that blends with the surrounding trim.
The middle ceiling support is a rigid cross‑member that reinforces the roof structure in cabs without a skylight. This Lined with sound-absorbing cotton support is made from stamped steel with a black powder‑coat finish. It provides additional rigidity to the roof, reducing vibration and noise, and serves as a mounting point for the centre roof lining.
The left side wall lining is a large trim panel that covers the inner surface of the driver‑side cab wall. This Lined with sound-absorbing cotton panel is constructed from the same fibreboard and foam‑backed fabric as the roof linings. It provides thermal and acoustic insulation, improving cab comfort. The side wall lining includes cutouts for window controls, speakers, and air vents.
The right side‑frame lining is the passenger‑side counterpart to the left side wall lining. This Lined with sound-absorbing cotton panel is symmetrically designed and provides the same thermal and acoustic insulation. It is trimmed with matching fabric and includes the necessary cutouts for door controls and audio speakers.
The interior trim cushion block package (NX-E) includes a set of foam padding blocks that are placed behind the linings to fill gaps and reduce rattles. This Lined with sound-absorbing cotton component effectively absorbs vibration and prevents the trim panels from drumming against the metal structure. The cushion blocks are made from closed‑cell PE foam, which is lightweight and resistant to moisture.
The rear interior panel is a full‑width trim piece that covers the back wall of the cab behind the seats. This Lined with sound-absorbing cotton panel is designed for MAX‑E cabs without a rear window, and it includes an integrated insulation layer. The panel is made from high‑density fibreboard with a fabric‑faced foam layer, providing excellent sound absorption and thermal insulation. It is secured with the supplied rivets and screws, ensuring a tight, rattle‑free fit.
Lined with sound-absorbing cotton – genuine HOWO complete interior lining and trim kit for MAX 4X2
This Lined with sound-absorbing cotton kit contains every panel, handrail, rivet, screw, washer, and cushion block required to fully finish the cab interior. No additional parts are needed for a complete installation.
The Lined with sound-absorbing cotton panels are manufactured with integrated foam layers that significantly reduce road, engine, and wind noise. The same layers provide thermal insulation, improving cab climate comfort.
All interior panels and trim parts in this Lined with sound-absorbing cotton kit match the original light grey colour scheme and texture of the HOWO MAX 4X2 cab, ensuring a seamless, factory‑fresh appearance.
The Lined with sound-absorbing cotton hardware includes stainless steel screws, zinc‑plated washers, and nylon rivets that resist corrosion and provide long‑lasting retention, preventing trim panels from loosening over time.
The Lined with sound-absorbing cotton system works by creating a multi‑layer barrier between the cab interior and the vehicle’s metal structure. The roof, side, and rear panels are constructed from a dense fibreboard core faced with decorative fabric and backed with acoustic foam. This construction absorbs airborne noise and reduces structural vibration,
lowering the overall noise level inside the cab by up to 6 dB(A). The foam‑backed lining also serves as a thermal insulator, reducing heat transfer from the roof and walls, which is particularly beneficial in extreme hot or cold climates.
The trim rivets and screws are strategically placed to hold the panels firmly in place, eliminating rattles and squeaks. The handrails and blanking caps add both functionality and a finished appearance. Together, these Lined with sound-absorbing cotton components create a quieter, more comfortable environment for the driver, reducing fatigue and improving concentration on long hauls.
Start by removing the old interior panels and cleaning any debris from the cab walls and roof. Install the middle ceiling support (without skylight) using the appropriate fasteners. Then, affix the roof linings using the interior trim rivets, ensuring they are evenly spaced to hold the panel securely.
Attach the left and right side wall linings with the same rivets and the supplied pan head screws. Install the right door frame upper handrail using the large washers and Torx screws. Place the cushion blocks behind the linings to fill gaps and prevent vibration. Fit the rear interior panel, securing it with rivets and screws. Finally, snap the blanking caps and plug covers into the unused mounting holes. The Lined with sound-absorbing cotton installation is now complete. Always refer to the vehicle manual for specific torque settings and sequence.
If a panel appears loose or rattles, check that all rivets and screws are fully seated. A missing rivet can allow the panel to move; replace it with one from the kit. If the fabric on a roof lining is stained or torn,
the panel may need replacement. If a handrail is wobbly, the screws may have loosened; retighten them with a Torx driver. Blanking caps that fall out should be replaced, as they may have lost their retaining clips. If the cushion blocks are missing, the trim may vibrate; install them in the designated locations. Always use genuine Lined with sound-absorbing cotton components to ensure proper fit and noise reduction.
The Lined with sound-absorbing cotton panels require minimal maintenance, but they should be inspected periodically. Vacuum the fabric surfaces to remove dust and dirt. Check for loose rivets or screws, especially after rough road driving. If the fabric becomes stained, clean it with a mild upholstery cleaner.
Inspect the handrails for secure attachment. The cushion blocks should be replaced if they have deteriorated. Regular inspection of the Lined with sound-absorbing cotton components helps maintain the cab’s acoustic and thermal performance.
This Lined with sound-absorbing cotton kit is designed specifically for the HOWO MAX 4X2 tractor cab, compatible with all production years from 2018 onward. The roof linings and side wall linings are pre‑formed to fit the MAX 4X2 cab dimensions. The middle ceiling support is intended for cabs without a skylight.
The rear interior panel is for MAX‑E cabs without a rear window and without an insulation layer. This kit is also suitable for SITRAK C7H and HOWO T7H models with identical interior dimensions. It is not compatible with older A7 or WD615 models, which have different roof and wall profiles. Always verify your cab configuration before ordering the Lined with sound-absorbing cotton kit.
Aftermarket interior linings often use inferior foam that degrades quickly, losing acoustic performance and sagging. Generic rivets and screws may not fit the factory holes, leading to loose panels and rattles. Non‑genuine handrails may have poor ergonomics or finish, detracting from the cab’s appearance.
Genuine HOWO Lined with sound-absorbing cotton components are manufactured to SINOTRUK’s exacting standards, using high‑quality materials and precise dimensions. The small additional cost of a genuine kit preserves the vehicle’s interior integrity, enhances driver comfort, and maintains resale value.
We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.
