Stock vs. aftermarket

3 replies to this topic

Posted March 13, 2010 - 09:40 PM


Are there any advantages of buying an aftermarket exhaust vs. just installing an insert to open up the stock exhaust?

  • Cirus

Posted March 14, 2010 - 05:04 AM


When I bought my 06 i tried the insert first and it was okay but I had a 04 YZ450 setting there with a powerbomb header and can so I decided to switch it out just to see the difference. Get the exhaust.

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  • drick

Posted March 15, 2010 - 07:41 PM


+1 for pipe / header.

i did megabomb + q4 and i love it. also very quiet for those of us in overly regulated Cali

  • WR450FGreg

Posted March 16, 2010 - 12:29 AM


There is little improvement to be gained by simply fitting an insert.
The rest of the muffler restricts flow too much.

If you're on a budget then open the muffler up properly and fit an insert for reasonable power improvement. Add a YZ450F header for full-blown version!

I have ridden, back-to-back, identical (apart from the exhaust) WR450Fs and I can categorically state that a properly modified, stock muffler, coupled to a YZ450F header performs as well, if not better than a (very loud) "Race" White Bros full system.

In summary: if you have heaps of money and like to waste it then buy an exhaust.
If not then do the mods.

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