First Mods

[Mr 5 0]

Scrapla:

3.55 or 3.73 rear gears are the most rewarding modification you can make for performance over stock. Get a PRO 5 0 or similar aftermarket shifter at the same time because you'll need it to keep up with the rapid climb to the redline with the new gears.

Everybody wants exhaust for the sound but in fact, the real bottleneck in the exhaust system are the catalytic converters.

Get the H-pipe (replaces converters) or if you have to pass emissions, go for a high-flow cat system (expensive but a good alternative). I like Dynomax mufflers but those are really more about sound than performance. Headers are optional with the stock heads and can be put off for awhile.

A cold-air fenderwell kit is optional at over $100. but I have a Moroso kit ($95.) that I like. It looks good, too.

Underdrive pullies are a good modification. Some have charging and cooling problems - some don't. Worth trying for about $100.

Think about getting sub-frame connectors, too. Good investment. No HP gains but vastly improved handling and launching, especially on an older 'Stang. Around $100.

Good luck with your Mustang.