ALS-029 Aluminum Spacer: Replacement Guide
By Yoshimura R&D of America, Inc. | Published: 2026-10-23
Category: Buying Guides
Learn when to replace the Yoshimura ALS-029 Aluminum Spacer, how it fits into your exhaust system, and key decision rules for choosing the right hardware.
Quick answer
The Yoshimura ALS-029 Aluminum Spacer is a direct replacement service part for your exhaust system. Use it when the original spacer is worn, damaged, or missing to maintain proper alignment and vibration damping.
Why the spacer matters for your exhaust
A spacer might look like a simple piece of hardware, but it plays a critical role in keeping your exhaust system securely mounted. It prevents metal-to-metal contact between components, reduces vibration transfer, and helps maintain consistent clearance around moving parts.
Over time, spacers can corrode, crack, or get lost during disassembly. Replacing them with the correct part avoids rattles, misalignment, and potential damage to the exhaust or frame.
Trade-offs to consider
Aluminum spacers are lightweight and corrosion-resistant, but they are softer than steel. If you frequently remove and reinstall your exhaust, the spacer bore may wear faster. For most street and track applications, aluminum is the right choice. For high-torque or extreme-duty setups, check that the spacer matches your mounting hardware specs.
Decision rules for replacing your spacer
- Inspect before ordering: Remove the old spacer and check for cracks, deformation, or corrosion. If it looks intact and measures the same length as a new ALS-029, you may not need to replace it yet. Only order a replacement if the old part shows visible wear or damage.
- Match the stack height: The spacer must match the original stack height to keep the exhaust bracket aligned with the frame mount. Using a spacer that is too short or too long can cause binding or stress on the exhaust hanger. Measure the old spacer length and compare it to the ALS-029 specification.
- Use correct fastener torque: Tighten the mounting bolt to the torque specified in your exhaust system manual. Over-torquing can crush an aluminum spacer, while under-torquing can allow movement and vibration. Always refer to the factory torque value for the specific exhaust model.
Product facts
- ALS-029 Aluminum Spacer: Yoshimura sells all small components including rivets, nuts, bolts, and grommets. If you don't see what you need, contact 800-634-9166 or email [email protected]. This means you can source the ALS-029 spacer directly from the manufacturer, along with any other missing hardware, without hunting for generic substitutes.
ALS-029 Aluminum Spacer
Fit guidance
Best for
- Replacing a lost or worn Yoshimura exhaust spacer
- Restoring proper alignment on street and track motorcycles
Not for
- Custom builds that require a non-standard spacer length or material
- Applications where a steel or hardened spacer is specified by the exhaust manufacturer
