Replacing the stock 914-4 front brake calipers with those from the BMW 320i is an inexpensive means of greatly improving the 914-4's braking performance. This Tech Tip covers the hows and whys of replacing the stock front brake calipers of the 914-4 with those from the BMW 320i. Included are the differences between the calipers, which calipers are needed, if and how they must be modified, and installation details. Part numbers are provided where applicable.
I used my 1974 914-4 2.0 as a testbed for this brake system upgrade. Prior to conversion to the 320i front calipers it was equipped with all the brake upgrades mentioned above, plus it had new rear calipers and rebuilt front calipers. Apart from these brake system upgrades, the car's only major deviation from stock are the 195/50VR15 tires.
Front brake calipers from a BMW 320i can replace the 914-4's stock front calipers, resulting in greatly improved braking performance. This TechTip contains all the information required to do this conversion.
In my opinion, falling short of upgrading the front calipers does not provide adequate braking performance for street use. Simple physics dictate that the rear calipers don't contribute much (a lot less than half, to be sure) to vehicle braking anyway. Hence the search for better front calipers. In order to keep costs down, I did not consider switching to 911 front struts, rotors and brakes (and wheels) a viable option.
|Brake Lines & Clips|
|Brake Line Clip||Flex Line to Bracket||43-635A-W023|
|Front Caliper Hardline||93-95 Left||43-720A-FD01|
|Front Caliper Hardline||93-95 Right||43-710A-FD01|
|Front Caliper Hardline (4-Piston)||86-92 Left||43-720B-FB05|
|Front Caliper Hardline (4-Piston)||86-92 Right||43-710B-FB05|