is this part for upper or lower
1109183
The notes on the page say "UPSTREAM" - that would be before the catalytic converter. But, check your manual to be sure.
1481442
No, you're set. Make sure you are satisfied with the height before completing install. The lower the better.
2177032
The base of the upper will set on the lower one and not slide as there's a groove created by the top's base. They include hardware to secure it, but I haven't used it.
1751172
It , I think, depends on wither it is high or low shank. Check before you purchase to make sure it is right for you machine.
314234
Here the website for their lower springs parts # http://www.tein.com/products/s_tech_price_list.html
177120
I will look at that part tonight to verify. Likely remount mine there if it fits. I'm going to say it will.
1341430
The lower one is the one I use it on. Works great for me. Never found anything else that ever worked but this.
230578
I didn't know the model number to my top. Measure the length your old supports and match accordingly. If you get supports to long the top may open higher but will bottom out before closing all the way if using original mounts. Hope this helps.
1002783
2 adjustments, high & low. I use low, works pretty well, maybe 2, 21/2"; just a guess....
1161772
We used a lower one and it fit. I don't think it could be too much higher though.
2225134
those are the bushings for the top threaded pin. the bottom is the stock replacement size by vehicle.
1067302
This product goes on the lower unit. The senders do NOT go on the engine. I put these on an alpha 1 gen 2 lower unit.
1020777
It all depends on your front site. I did not want to remove it so I needed a higher riser to see over it.
654734
Don't know for sure. I bought both front and rear popup sights to mate with my Flat top upper and the"raised" gas block (to match the pop up rear sight on my new flat top upper). They aligned perfectly! I'm doing to do an upgrade soon to replace my Olympic A2 upper with a Flattop upper and although I've got a rear & front flip up set (I got FS & RS from Amazone for $22/ W free shipping. I think they're greart.) decide to keep my stock fixed mil spec FS. We'll see which option works better. question me in a month or so (Wish I couild jump on the "fun" stuff vs. 'day to day crap' right now, but can't.) I'll find out if the std Fixed FS aligns with the flattop popup RS W/I a few weeks. Remind me! Don't know for sure. I bought both front and rear popup sights to mate with my Flat top upper and the"raised" gas block (to match the pop up rear sight on my new flat top upper). They aligned perfectly! I'm doing to do an upgrade soon to replace my Olympic A2 upper with a Flattop upper and although I've got a rear & front flip up set (I got FS & RS from Amazone for $22/ W free shipping. I think they're greart.) decide to keep my stock fixed mil spec FS. We'll see which option works better. question me in a month or so (Wish I couild jump on the "fun" stuff vs. 'day to... » Read More Don't know for sure. I bought both front and rear popup sights to mate with my Flat top upper and the"raised" gas block (to match the pop up rear sight on my new flat top upper). They aligned perfectly! I'm doing to do an upgrade soon to replace my Olympic A2 upper with a Flattop upper and although I've got a rear & front flip up set (I got FS & RS from Amazone for $22/ W free shipping. I think they're greart.) decide to keep my stock fixed mil spec FS. We'll see which option works better. question me in a month or so (Wish I couild jump on the "fun" stuff vs. 'day to day crap' right now, but can't.) I'll find out if the std Fixed FS aligns with the flattop popup RS W/I a few weeks. Remind me! « Show Less
1775307
I've got 2 sets of these, the blue middle does indeed screw onto the red upper, I have no issues with mine doing so
878088
This part worked fine for me. I would be sure to compare what you have and do not hesitate to question the seller. They do not want to sell you a part you do not need.
786903
As long as your gas block and upper receiver are on the same plane. If your gas block is a quarter inch lower you will need the sights specific for a lower gas block