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Yoshimura RS-4 Full System 399000D520


  • Our price $735.00
  • MSRP Regular price $773.68
  • You save $38.68 (4%)
  • Order Soon Only 3 left

Product Overview

Overview of Yoshimura RS-4 Signature Series Exhaust System - 399000D520
  • The RS-4 Full System uses the same technology that goes into our Championship winning MX RS-4
  • Each full system features 20 gauge 304 stainless steel CNC rolled and robot welded canister shell with a carbon fiber cone end cap
  • It also features an anodized, CNC mounting bracket and articulating silicone rubber mounting bushings
  • The RS-4's premium muffler packing help meet the USFS noise specifications
  • Pentagonal-shaped sleeve
  • 304L stainless steel CNC rolled and robot-welded canister
  • Two stage stepped perforated baffle
  • Carbon Fiber end cap with embossed logo
  • CNC mandrel-bent polished 304L stainless steel header and tailpipe
  • CNC mounting brackets and articulating silicone-rubber mounting bushings
  • USFS approved spark arrestor installed
  • Weight:  9.6 lbs lighter than stock configuration

Included Items:

(1) Aluminum header pipe #1 W/flange 

(1) Aluminum header pipe #2 W/flange

(1) Aluminum muffler assembly

(2) Gold aluminum muffler hanger brackets

(4) 8mm Large flat washers

(2) 8mm X-Large flat washers

(4) Rubber grommet

(3) Gold aluminum spacers

(4) 8mm-1.25 Serrated flange nuts

(3) 8mm-1.25 x 40mm Flange hex head bolts

(1) 8mm-1.25 x 60mm Flange hex head bolt

(2) Gold aluminum large spacers

(1) Gold aluminum spool spacer

(1) O2 Bung plug

(2) Exhaust springs

(5) Hose clamps

(1) Spring puller

(1) Exhaust plug



Brand LionParts
SKU # 194764-Yoshimura-EH-TR
Weight 16.0 lb

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Delivery times vary according to location and product purchased. The estimated delivery time provided at the checkout is an estimate only. Actual shipping time may vary. does not take responsibility for shipping delays caused by the carrier. To ensure you're receiving exactly what you want, some orders are sourced from various shipping facilities. This may cause different parts of your order to arrive separately.

Detailed shipment dates and tracking numbers will be sent to the email address provided at the time of checkout. In the event your order can't be shipped, we will contact you within two business days explaining why your shipment has been held up.

With any questions or concerns, contact us at 1-800-983-2210.

We aim to ensure you receive the best quality product, suited to your unique needs.

If a part doesn't fit or you aren't completely satisfied with your purchase, the majority of our products are eligible for a full refund within 30 days of delivery. To be eligible for a refund, products must be unopened.

Refunds can be anticipated within four weeks of depositing your package to a return shipper. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return when we receive it (3 to 5 business days) and the time it takes your bank to process our refund requests (5 to 10 business days).

If you require a refund and return, please contact us for authorization. We will notify you via email once we have received and processed the returned item. 

For any questions or concerns, call us toll-free at 1-800-983-2210. We can also be reached by email at 

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