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i have the greddy long tube intake....looks just like stillen love it a bit cheaper than the stillen.... also works great with the greddy cat back exhaust
I just bought the r2c intake because on my previous altima it had a nice sound and felt very well manufactured. I also like the oil less filter. I will give my butt dyno opinion when I am done. I also am putting my bullydog tuner from my altima on it. So that could skew the results a bit. I might do them separate. The bully dog tuner smoothed out my 3.5 altima. I am hoping it does the same for the 3.7.