Firstfives.org

Thanks T.Hanson,
Was hoping Jeff would chime in. May have to try that.

I believe my speedometer is off by 5 to 10 mph or more depending at what speed I am doing. At 25-35 mph it seems it's off by about 5mph, then when I am doing 35-45 or more it's off by 10mph or more. What gives? I noticed while doing a nice long drive on highway, looked down and speedometer said 138 ...

Thank you for your responses.
I think I'd prefer low/mid range gains since these cars already feel great up top.

I have heard of Supersprint, Ireland Eng. and Stahl, but I was wondering if someone had any input or experience on design, fit, performance and such.

Can anyone recommend exhaust headers for my 78 530i? I am looking to replace/remove the thermal reactors and smog equipment.

Also wondering if the same headers would fit an M90 with production date 10/1980?

Thanks.