I you are downshifting, or if you are petal to the metal you can see fire in between shifts. Its because our cars run rich and the fire is the unburned gas in the exhaust that is being ignited. With a down pipe this is common.
No stress it looks great believe it no not some people put spark plugs in there exhaust to get this effect.
No stress it looks great believe it no not some people put spark plugs in there exhaust to get this effect.