Ideal for supercharged or twin turbocharged applications, the ScienceofSpeed 3" Forced Induction Exhaust Systems allow increased flow with minimal backpressure.
A unique exhaust design was employed to provide a 3" header-back exhaust system. The exhaust system consists of pre-muffler assemblies and the exhaust muffler assembly. The pre-muffler assemblies, available ad catalytic converter or racing test pipe assemblies, join factory location ball socket joints with the exhaust muffler assembly.
This design allows the exhaust system to mount to factory and aftermarket headers for supercharged applications and down pipes for twin turbocharger applications.
We recommend this style of exhaust system for applications with power requirements in excess of 400-450 whp.
Two choices are available for both the pre-muffler assemblies, and the exhaust muffler assembly:
Both the muffler assembly and pre-muffler assemblies are required.
Exhaust Muffler Assembly:
The exhaust muffler assembly is available in GT-Spec or R-Spec.
GT-Spec Exhaust Muffler:
The GT-Spec is the quieter muffler design with an internal cross flow perforated tube design. The tubing and flanges are 3.0" through out with twin single wall 3.5" angle cut polished tips. All components including tubing, body, internal perforated tubing, flanges, hanger rod, and tips are constructed from stainless steel and are back-purge TIG welded. The pitch is a deep baritone. At idle and cruising speed, the exhaust is approximately 10% louder than a factory exhaust and 20% louder under wide open throttle. This exhaust has little to no interior resonance during constant throttle cruising.
R-Spec Exhaust Muffler:
The R-Spec Muffler is the highest flowing muffler design. With twin straight unbaffled resonators, the system produces approximately 5% more power at the same boost pressure compared to the GT-Spec Exhaust Muffler. The tubing and flanges are 3.0" through out with twin single wall 3.5" angle cut polished tips. All components including tubing, body, internal perforated tubing, flanges, hanger rod, and tips are constructed from stainless steel and are back-purge TIG welded. The pitch is a deep bass. At idle and cruising speed, the exhaust is approximately 20% louder than a factory exhaust and 50% louder under wide open throttle. This exhaust has minimal to moderate interior resonance during constant throttle cruising.
The pre-muffler assemblies are the units that connect the headers/downpipes to the muffler assembly. They are available as a straight through racing test pipe or as high flow catalytic converters. These assemblies use the factory ball socket flange on the inlet, and a V-band flange and clamp on the exit. The tubing steps up to 3.0" and features stainless steel tubing and V-band flanges and clamps. Note that straight through test pipes increase volume of the exhaust by approximately 20%. Straight through racing test pipes are for offroad testing use only and are not designed for use on emissions controlled vehicles.
Please note: Catalytic converters are designed for high pressure high temperature forced induction use. They are not designed however for systems that have air/fuel mixtures below 11:1 AFR. Systems not properly tuned with air fuel mixtures below 11:1 AFR will cause unburned fuel to enter the catalytic conveters causing ignition and elevated temperatures. There is no warranty provided for catalytic converters damaged from unburned fuel entering the catalytic conveters.
Compatible Headers / Downpipes:
- Any aftermarket header system designed for 1991-99 NSX with ball-socket type joints.
- Factory 1995-99 headers.
- ScienceofSpeed Twin Turbocharger System downpipes.
Please note: Both the muffler assembly and pre-muffler assemblies are required. Please select one pre-muffler assembly (straight-through tubes or catalytic converters) and one muffler assembly (GT-Spec or R-Spec). Removing the factory catalytic converters is designed for offroad use only.