XR650R, Is the stock header restrictive?

I have a slip On (T-4) Is it worth buying a full system or even just an aftermarket Header? Wich ones will fit with my T-4?

Dear Blown Away,

Am sorry to hear that this has happened we will all miss you......wait a minute.

The pipe thing,depends where you want your power if you want a strong bottom to mid hit keep the stock headers and use the t4 slip on,if you want mid to top hit go big+ the t4.

If you want it all go big get a cam and raise your compression so ya keep some bottom.

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