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I see no H pipe as advertised on the first one. But other than that, the difference is the tips, the b pipes are longer (on SES), and clamps on the SES as opposed to a gasket connection. Other than that, are there any functional differences?
i haven't heard the HKS in person...but all i know is that injen is cheaper
Not being biased, do you like the Injen? would you rather have gone another route? does it have that exotic sound we all like or is it more on the raspy side?
also, ive read there is some minor modification when installing the HKS (i think something with a heatsheild), is this the same case with the Injen?
Ive only heard an HKS exhaust once in person. To me, it doesnt sound as deep as my Injen. At idle and lower rpms, the Injen gives a low bellowing rumble. When I reach the upper RPM's, it just screams.