I have searched hi and low on this forum and I am looking for hands on answer.
Has anybody decatted the stock header that can tell me if there was power loss or gained anywhere in the power curve. I know those new head pipes everyone has started to come out with are nice and pretty but what kind of gains if any are we going to see over the stock decatted pipe.
I am also running Rinehart 4" slipons.
I have searched hi and low on this forum and I am looking for hands on answer.
Has anybody decatted the stock header that can tell me if there was power loss or gained anywhere in the power curve. I know those new head pipes everyone has started to come out with are nice and pretty but what kind of gains if any are we going to see over the stock decatted pipe.
I am also running Rinehart 4" slipons.
I have friend who just picked his new bike up from the dealer. He has Kerker Stouts, High Flow AC, TTS tuner and the dealer decatted the pipe for him. All of this was done by the dealer before he ever picked it up. The bike runs great but with all that done at once I dont think he will be able to say which made the most improvement. Good luck!
I have searched hi and low on this forum and I am looking for hands on answer.
Has anybody decatted the stock header that can tell me if there was power loss or gained anywhere in the power curve. I know those new head pipes everyone has started to come out with are nice and pretty but what kind of gains if any are we going to see over the stock decatted pipe.
I am also running Rinehart 4" slipons.
A new non-cat headpipe also requires a proper tune. The combination of the proper tune and headpipe has shown generally around a 8-10hp + 8-10ft-lb increase in power (give or take). Improvements are over the entire curve for the most part and vary based on the cam and heads you start with. Take a look at Fuelmoto's M8 dyno library for examples.
I have searched hi and low on this forum and I am looking for hands on answer.
Has anybody decatted the stock header that can tell me if there was power loss or gained anywhere in the power curve. I know those new head pipes everyone has started to come out with are nice and pretty but what kind of gains if any are we going to see over the stock decatted pipe.
I am also running Rinehart 4" slipons.
Be careful as the M8 exhaust is much better than the old Twincam exhaust was. The typical gains you saw on a TwinCam are NOT there with the M8 exhaust change. Now if your adding cams, heads and such it's different.
From what I've seen so far, from those posting their back-to-back testing, with a Stage-1 style build, de-catting the stock headpipe did NOT show any power gains. Just noise level changes... Add more exotic parts to the build (IE. camshaft) and your results may vary!
I have friend who just picked his new bike up from the dealer. He has Kerker Stouts, High Flow AC, TTS tuner and the dealer decatted the pipe for him. All of this was done by the dealer before he ever picked it up. The bike runs great but with all that done at once I dont think he will be able to say which made the most improvement. Good luck!
Any dealer that does this can face huge fines from the EPA.
Any dealer that does this can face huge fines from the EPA.
EPA has NEVER fined a retailer (which is what every HD dealership is) and definitely won't be giving fines to retailers under the current administration, particularly after they have their budget slashed.
BTW, here's a stock M8 107 with a decatted headpipe/mufflers and tune vs factory setup. Tune plus exhaust resulted in 10hp/10 ftlbs improvement over stock
It don't matter the EPA is not going to have the funding for keeping us and our dealers honest. I don't want to turn this into a political thread, but my prediction is let the good times roll with our free flowing exhaust����
It don't matter the EPA is not going to have the funding for keeping us and our dealers honest. I don't want to turn this into a political thread, but my prediction is let the good times roll with our free flowing exhaust����
You may very well be right, but I wouldn't want to get rid of any take off parts which might be needed down the road. The EPA is like any entity or business, they can use budget dollars to police or improve on anything they feel is needing the attention. The EPA also has more funding than just budgeted federal dollars, they take in millions of extra dollars from non compliance fines which can be used to bump up the budget.
Think about them as you would a local Police dept. Need more money, just right more tickets and let the fines from those tickets take care of your needs.
03-15-2017 | 10:47 PM
M8 head pipe
