I have a 89' h/b & I want to install an amplifier but there is no hole in the firewall into the car....Do I have to drill a hole or is there anything else I can do... All help is appreciated!

 

there should be a plug-like wire that is under the slave cylinder that u can pull out and it should have a hole leading to the pedals, and if not then jus drill a hole, not a big deal

 

if you drill a hole, use a grommet or file so its smooth. you don't want your amp wire jacket to get cut.

 

run the wires through the same hole as the main harness, it's on the right side of the firewall (when facing the engine from in front of the car). You can use the harness grommet that's already there to keep the new wires from getting cut

 

Make your own hole and use a gromet.

 

Don't really have to - the main engine harness rubber grommet is big enough to handle the main harness + 1 10ga amp wire + 6 alarm wires + 2 EDFC cables (so far). This I know because, well - it's on my car

 

its fits 4 gauge jus fine too with lots of extra space

 

there is a grommet on the same side as the batter. lube up the wire with some lotion and it will slide right through. no need to run the cable around the engine bay.

 

Isn't that what I was talking about?

There's 3 including the main one I suggested... but only if you have no A/C - otherwise the A/C hardlines use the extra ones. There's 5 total on the right side that is easily accessible, but 2 are reserved for the heater hoses and one for the main harness. There is one more, but it's tucked behind the right side wheel well, high up, and it is used for another engine room harness.

I speak from experience here as we recently gutted the firewall area of an 89 coupe, and the firewall is the same on all S13's from what I've seen