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Dr. D NS-4 Complete Exhaust
Dr. D NS-4 Complete Exhaust

$346.99 - $821.99
10% Off - Save up to $91.00

Description See Also: 6 Reviews 12 Questions Fitment Part Numbers
Item #DRD000C

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6 Reviews
4.5 out of 5 stars
5 Star   5 4 Star   0 3 Star   0 2 Star   1 1 Star   0
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All Reviews
Verified Purchaser
Washington WA
2015 Yamaha yz250f

Absolutely the best exhaust system for your money. I seen power Gaines through the whole power curve, also comes with a spark arrester insert, fit and finish was excellent. I would definitely buy this exhaust system for any of my other bikes. The motor sport team that I talk to over the phone also was very knowledgeable about the product that I wanted and I left feeling taken care of thanks so much.

Sorry my daughter stills every picture
Verified Purchaser
Brighton, CO, USA
Awesome exhaust!

Fit and finish is outstanding and second only to how well this pipe performs. I installed this on my 2007 YZ450F and am extremely happy with the sound, performance and looks of this pipe. Install was a breeze and it looks awesome. Performance is second to none, I would highly recommend this exhaust to anyone looking for increased performance at a great price. You won't be disappointed!

Dr. D NS-4 Complete Exhaust
2016 yz450fx drd

i put this pipe on my 2016 yz450fx and now touching the throttle is like hitting a nitrous button, love it

Verified Purchaser
Chicago, IL, USA
Into it

i've been using Dr. D's in every bike that i have and i'm comfortable with it . for me and my friends its Dr. D or nothing .

Verified Purchaser

Verified Purchaser
Not worth it.

it is causing a lot problems with my jetting even after going to Dr. D's website. Still not able to get it to stop back firing all because I changed to this pipe.

12 Questions
Answered:   11
Not Yet:   1
Q: Any extra tuning need to be done after installing this full system on a 18 kx450f
24 days ago
Top 10
24 days ago
A: It is not necessary, however the manufacturer recommends it for the maximum potential from the exhaust.
Q: Looked all over the internet to look for review and sound clips with a full DRD system for a 2018 kx450f but cant find anything how well is this exshaust match with a 18 kx 450
27 days ago
Top 10
27 days ago
A: Dr. D may not have done that, have you checked with any other sites, message boards or with Youtube by chance?
Q: I was looking to purchase this full system exhaust for my 2015 honda crf150f and was wondering how tough is the installation of this exhaust is and if I could do it at home or have to take it into a shop.
2 months 4 days ago
Top 10
2 months 4 days ago
A: We always recommend that you take your higher priced ticket items and performance pieces to a certified technician for installation.
Q: I accidentally commented on the slip on before but why does this item not show picture of head pipe ?
Over 8 months ago
Top 10 Contributor
Over 8 months ago
A: I have included a link to Dr. D's full exhaust photo.
Q: It says complete exhaust so does it come with head pipe too
Over 10 months ago
Top 500
Over 10 months ago
A: Yes it will include the necessary pieces to a complete a system.
Top 25
Over 10 months ago
A: Yes this exhaust features and comes with stainless steel header, mid pipe and carbon fiber or aluminum muffler.
Over 10 months ago
A: Yes a FULL system comes with the head pipe. While a slip on is only the rear muffler/ sliencer. Which is why it's a cheaper price than the full system.
Q: For a 2006 kx250f will the header pipe have the pdh chamber?
1 year 8 months ago
Q: Will this work on my 2006 ttr230 and is it full exhaust system
2 years ago
Is there a big power change
MotoSport Staff Expert
2 years ago
A: Yes, complete system and fits your 2006 Yamaha TTR230. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct exhaust for your bike. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Q: Is the spark arrestor screen removable in the DR.D exhaust system?
2 years 8 months ago
MotoSport Staff Expert
2 years 8 months ago
A: The All Stainless Steel/Aluminum Dr. D NS-4 systems come with a Spark Arrestor screen.
Q: I'm thinking about buying this system for my 2013 kx250f along with a loudmouth intake system. Would I need to have the ecu remapped?
Over 3 years ago
Expert MotoSport Staff
Over 3 years ago
A: Generally with a full system reprogramming is necessary for optimum performance.
Q: Do I need to buy a jetting kit for this exhaust?
Over 3 years ago
Im thinking to buy this one but not sure if u need a jetting kit or other work before putting it on. I have a 2009 ttr230.
MotoSport Staff Expert
Over 3 years ago
A: Yes generally when installing a complete exhaust system you will need to re-jet. It would really depend on your location (altitude/temperature) and how your bike is running with the current jetting. Jetting can be very tricky, there isn't one setting that will work everywhere with every bike. I would recommend taking your bike to a local motorcycle dealership’s service department to have your bike properly jetted.
1 - 10 of 12
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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Stainless Steel / Carbon Fiber N/A
Stainless Steel / Aluminum 7619
Stainless Steel / Carbon Fiber 7637
Stainless Steel / Carbon Fiber 7659
Stainless Steel / Carbon Fiber 7661
Stainless Steel / Carbon Fiber 7667
Stainless Steel / Carbon Fiber 7679
Stainless Steel / Carbon Fiber 7687
Stainless Steel / Carbon Fiber 7698
Stainless Steel / Aluminum 7421
Stainless Steel / Aluminum 7404
Stainless Steel / Carbon Fiber 7405
Stainless Steel / Aluminum 7370
Stainless Steel / Aluminum 7374
Stainless Steel / Aluminum 7310
Stainless Steel / Aluminum 7342
Stainless Steel / Aluminum 7316
Stainless Steel / Aluminum 7324
Stainless Steel / Aluminum 7334
Stainless Steel / Aluminum 7301
Stainless Steel / Aluminum 7516
Stainless Steel / Aluminum 7581
Stainless Steel / Aluminum 7429
Stainless Steel / Carbon Fiber 7430
Stainless Steel / Aluminum 7454
Stainless Steel / Carbon Fiber 7455
Stainless Steel / Aluminum 7512
Stainless Steel / Aluminum 7513
Stainless Steel / Aluminum 7521
Stainless Steel / Aluminum 7525
Stainless Steel / Aluminum 7535
Stainless Steel / Aluminum 7537
Stainless Steel / Aluminum 7556
Stainless Steel / Carbon Fiber 7557
Stainless Steel / Aluminum 7571
Stainless Steel / Carbon Fiber 7572
Stainless Steel / Aluminum 7578
Stainless Steel / Aluminum 7587
Stainless Steel / Aluminum 7589
Stainless Steel / Aluminum 7590
Stainless Steel / Aluminum 7594
Stainless Steel / Aluminum 7614
Stainless Steel / Carbon Fiber 7615