2005 nissan altima 2.5s firewall bypass

There isn't a rubber grommet big enough, but if your car is an auto.  There is  a cut out you can use where the clutch pedal would located on the firewall.  Look for a cut out in the insulation, kinda looks like a rounded out flattened diamond.  Its perferated already, so it will just rip right out.  Then just drill out yourself a hole, it will be safe to drill since there is nothing behind it in the engine compartment.DTS Performance

St Petersburg, FL

well i did my friends altima 05 last month. When you open the hood to your left (passenger side) there will be a large rubber grommet where the wires run though the firewall. I had some trouble getting it in. What you should do first is. go under the dash on passenger side. it will be far up. you can feel a rubber piece. use a knife and cut a small hole. run a coat hanger through and connect your 0 gauge. pull slowly and you should be through. just spray some wd40 on the grommet so when u pull it through it would be very easy.

hey, I'd just do it the same as any other firewall cable, find a safe spot to drill a hole, put in the rubber gromit(yeh they do come that big)and push your wire through. Good luck