Hi Simon, no metal had to be cut. Check out the post I made in the Tech & Mod. section of the forum, I just cut the top off the plastic piece's on each side of the radiator support. The reinfroced 2&1/4 ID hose's will fit through there, I used two 5" long piece's to stick the intake tube's through after using a heat gun & some pipe to take the ends of the tube's from 1&3/4" to 2&1/4". I had a pic of the pipe stuck in the tube's showing how they expanded, but I didn't get that pic posted.

 

I had good gain's with the SL55 hose's & "Y", but I do have a Renntech modded ECU & pulley. As for what I did on making the ends of the intake tube's bigger, I really can't say I got any gain's. It was 38 degree's out that day when I was using a G-Tech to test it out, I only made two runs and was spinning like hell on launch. I was hitting 12.3 & 12.4 in the 115's.

 

Cheers Steve,

I may try this too, but if there is room to "slashcut" the new hoses I may do that to increase the size of "scoop" to force more air in. I was wondering if they did Adhesive heat shrink tubing in that size as that may make thing easier to join the pip together.

I would be interested to know how much difference it makes when you have a "comparable" day to test it on.

Si

 

After I expanded the ends on the intake tube's they fit into the 2&1/4" ID hose pretty tight. The hose I used was Gate's brand, I believe it's used for BIG truck radiator hose's, they sell it by the inch ($1.45). I thought about doing a beveled or slash cut too and probably will. The reason I didn't is because I had thought about adding a fitting on the ends to point them down, you wouldn't believe all the bugs that were in the bottom of my filters. I figured it was because the tube's pointed straight forward were the bugs had a straight shot to get in.

Steve