Upgrading
the stock exhaust system on the 2nd generation RX-7 is
going to be the very first thing you’ll want to
do in your quest for a more responsive, powerful car.
Even with the wildest intake and ported motor, you won’t
begin to see the true benefits of the other modifications
until the exhaust has been improved.
The exhaust system itself is going to consist of basically
two separate components that can either be upgraded at
the same time or separately without too much trouble.
The first section is the catalytic converter system which
consists of everything from the stock exhaust manifold
on the motor to the very last main catalytic converter
which bolts to the y-pipe. The second section consists
of the y-pipe and two mufflers which end at the rear of
the vehicle. This last section is commonly referred to
as the “cat-back” system meaning everything
after the catalytic converters.
On the stock exhaust system, the items that rob the most
power are the catalytic converters. For racing purposes,
the easiest solution is to replace the complete cat system
with a race pipe. If you drive your car on the street
though, some form of catalytic converter must remain intact
to keep the car street legal. The trick is finding a catalytic
converter that flows better than the stock converters,
keeps the car emissions legal, and can handle the intense
heat of the rotary exhaust gases. In our testing of aftermarket
cats, we found that the only one capable of meeting all
of our performance and reliability requirements are the
Bönez catalytic converters.
Another important factor to remember when looking at upgraded
exhaust systems is the provision for allowing the 6 port
actuators to work properly. These actuators open up the
auxiliary intake ports at higher RPMs for a broad powerband.
Since the 86-88 models utilize exhaust backpressure to
open the ports, we place a sensing tube at the point of
highest exhaust pulse intensity to allow the ports to
work properly. This feature, among other subtle “attention
to details” features, have all been developed through
our extensive knowledge of the RX-7. Something that mail
order houses simply cannot provide.
•Non-Turbo
•Turbo
II •Catbacks
The
Bönez Street Exhaust Systems utilize an ultra
high temperature, high flow catalytic converter
that has been specifically designed to handle the
high exhaust temperatures the rotary engine produces.
2.5" piping feeds into a pre-silencer before feeding
into our high flow catalytic converter. These systems
simply bolt up to the stock exhaust manifold and
connect to the stock or aftermarket cat back exhaust
systems.
Bolt
and Gasket Kit
Price: $25.00
The
Bönez Street Exhaust Systems utilize an ultra
high temperature, high flow catalytic converter that
has been specifically designed to handle the high
exhaust temperatures the rotary engine produces.
2.25" piping feeds two high flow catalytic converters.
These systems simply bolt up to the stock exhaust
manifold and connect to the stock or aftermarket
cat back exhaust systems.
Note: The Bönez Dual Cat
System does not fit automatic equipped cars.
Bönez
Dual Cat System - 86-91 (fits only manual
transmission)
Price: $588.32
Bolt
and Gasket Kit
Price: $25.00
We also offer the Bönez cat replacement "Race Pipe" which replaces
all catalytic converters (or cats) and connecting pipe with a straight pipe and presilencer package.
The Race Pipe attaches to the exhaust manifold outlet at one end and the the original Y-pipe
(or replacement exhaust) at the other end.
Great upgrade for a car that gets used for track events, since it's not legal for street use...
Note: Not legal for street use, sold for racing use ONLY!
Bolt
and Gasket Kit
Price: $25.00
For
those of you looking for a streetable header system
on your 86-91. Headers are the ideal way to get the
last couple of horses from your normally aspirated
engine. For quite some time, the only way to have headers
was in an emissions “unfriendly” and noisy package.
Now we’ve combined the best of both worlds. Headers
and the trusted Bonez performance catalytic converter.
Don’t forget: You must keep the air injection system
functional on your car to make the emissions system
work properly. (ex: air pump, air control valve, etc.) The Bonez
converter reduces emissions and the annoying exhaust noise that
comes with the installation of headers.
For 1986-91 RX-7 owners who already have a Racing Beat header/
presilencer system on your car but need to pass
emissions testing or want to reduce the noise and rotary "smell".
This converter is the perfect way
to return your FC to emissions pass-ability, a nice exhaust note and less "odor".
This Bönez
catalytic converter is an exact bolt in replacement for the
Racing Beat presilencer.
Racing
Beat Street Header/Bönez Cat System - 86-91 Non-Turbo
Price: $649.00
Bönez
Catalytic Converter only - for use with Racing Beat
Street Header
Price: $296.40
Bolt
and Gasket Kit for installation of cat to header
Price: $25.00
The
Bönez Turboflo Exhaust System has been designed
to give optimal safe HP gains by utilizing a 2.5"
downpipe and an unique ultra high temperature, high flow
2.5" catalytic converter. This system helps reduce
the stress placed on the engine and turbo and keeps noise
levels down at an acceptable, sporty tone. We’ve
found that many stock catalytic converters get more restrictive
after time and are the cause for loss in performance
and increased engine wear.
Bönez
Turboflo System - 87-91 T2
Price: $369.00
RP
Aftermarket O2 Sensor
Price: $40.00
This
pipe is a perfect replacement for the factory connecting
pipe of any 1987-91 Turbo II. The pipe fits between
the factory precatalyst and the main converter and
frequently rusts beyond reuse. Our pipe is slightly
larger ID at 2.5" and can be used with any combination
of precatalyst or Bonez downpipe, main catalytic converter
or midpipe.
Bönez
T2 2.5" Connecting Pipe
Price: $119.22
We
also offer the Bönez Main Cat Race Pipe which
replace just the main catalytic converter with a
straight pipe. This unit makes it extremely easy
to swap between the stock cat and racing pipe for
extra HP for track events yet still remain legal
for the street.
Note: Not legal for street use in some states. Racing
use ONLY!
Bönez
Race Pipe Main Cat - 86-91
Price: $98.12
Bönez
JDM Race Pipe Main Cat - JDM RHD VEHICLES ONLY - 86-91
Price: $99.12
Bolt
and Gasket Kit
Price: $25.00
The Bönez Racing
Exhaust components give the Turbo II a noticeable increase
in performance. The pipes replace all the catalytic
converters to optimal flow and less stress on the engine
and turbo. Boost levels will also increase approximately
1-2psi over stock and depending on what other modifications
have been made, you might experience the factory fuel
cut. We offer a fuel cut defenser that
tricks the stock computer into thinking it’s
running under the factory cut off point.
Note: Not legal for street use in some states. Racing
use ONLY!
Bönez
2.5" Downpipe - 87-91 T2
Price: $137.00
We
also offer the Bönez Catalytic Converters separately
as a directly replacement for the stock main cat.
These unique cats utilize 4th generation catalytic
convertor technology and are specifically designed
for the rotary engine. They are available with a
2.5" inlet/outlet diameters and will bolt to
stock or aftermarket cat-back systems.
Bönez
Performance Main Converter - 86-91
Price: $264.00
Bolt
and Gasket Kit
Price: $25.00
Just
what’s needed for your custom RX. These catalytic
converters are the same quality units used in their
direct bolt in systems. Recognized as the freest
flowing and most durable of all the catalysts, you
simply can’t go wrong with Bönez. Available in a
variety of pipe sizes.
Race
bred exhaust system. Minimal bends with increasing
diameter piping for highest exhaust flow. System
includes a presilencer for a mellow tone. Please
note, this system is designed for max power and uses
a single sided exhaust outlet. Piping diameter: 65-70-85(mm).
Note: Due to the box dimensions, a UPS oversized
surcharge ($55.00) will be added to the total.
A’PEXi
N1 Racing Exhaust - 86-91
Price: $549.95
A’PEXi
Dual N1 Racing Exhaust - 86-91
Price: $1098.00
Can
be used with APEX’i N1 system to reduce noise
while street driving (this unit is included with
the GT system). Made in Japan by Apex’i.
A’PEXi
N1 Silencer Removal Tool
Price: $16.50
Absolutely
the highest flowing street system we sell. FULL Stainless
Steel construction. Presilencer built-in. Race developed
single sided outlet, Comes with bolt-in silencer
for street use. Piping diameter: 65-75-85(mm)
Note:
The A’PEXi GT Exhaust is on sale for a limited time.
A’PEXi
GT Racing Exhaust - 86-91
Price: $649.95
