Greddy Ti-C Cat-Back Exhaust
Pros:
Full TIG-welded construction, smooth mandrel bends, lightweight and perfect fitment-what was there not to like? The part bolted on in minutes, made power, fit the profile of the car perfectly, and increased the exhaust note without adding any dreaded raspiness, Japanese construction and performance at its best.
Cons:
It's a little on the loud side.
Parts:
Exhaust, gaskets, and hardware.
Tools:
14mm socket, extension, and wrench; 14mm open-end; PB Blaster, breaker bar or impact wrench.
Installation Time:
30 minutes
Notes:
Like most aftermarket Miata exhausts on the market that actually make power, the GReddy unit has an aggressive tone. Unlike the others, though, the increased acoustic output doesn't include any annoying harshness. Louder, yes, but deeper and meaner sounding above all. Even with the included silencer in place, drivers of naturally aspirated cars may find the exhaust note a bit obtrusive. But isn't that what roadsters are all about?
Racing Beat 4-1 SS Header
Pros:
Looking at the merge point of our OEM header's collectors, we see a huge restriction that is replaced by a much larger, smoother merge point in the Racing Beat unit. Longer, equal-length runners also improve power, and stainless, TIG-welded construction ensures a lifetime of service.
Cons:
Because our Racing Beat header features longer runners than the OEM part does, the O2 sensor has to be positioned further away from the engine bay, meaning its one-wire harness had to be lengthened accordingly-a small price to pay for more power.
Parts:
Header and gasket.
Tools:
10- and 12mm sockets, 14mm deep-well socket, swivel, extension, wrench; impact gun or breaker bar; PB Blaster; 14- and 22mm open-end; wire, loom, and wire stripper; soldering iron set, Phillips and flat-head screwdrivers.
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