ScienceofSpeed Ultra-High Output Forced Induction Exhaust Systems - NSX, 1991-05

Description

Ideal for supercharged or twin turbocharged applications in excess of 475 BHP and up to 700 BHP, the ScienceofSpeed Ultra-High Output Forced Induction Exhaust Systems allow increased flow with minimal backpressure. 

Designed & manufactured by ScienceofSpeed - a unique exhaust design was employed to provide a 3" header-back exhaust system consisting of pre-muffler assemblies and the exhaust muffler assembly designed to work together. The pre-muffler assemblies, available with ultra-high output catalytic converters or racing test pipe assemblies, join the exhaust assembly, available with a single exhaust muffler (GT-Spec) or individual barrel-style resonated mufflers (R-Spec). This design allows the exhaust system to mount to factory and aftermarket headers for supercharged applications and ScienceofSpeed Twin Turbocharged downpipes.

The system is designed to flow up 81 LB/MIN of airflow (approximately 700 HP). For applications less 475 horsepower, the ScienceofSpeed High Output Catalytic Converter Set is available.

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).

Features

  • Designed for ScienceofSpeed Twin Turbocharger Systems or aftermarket exhaust headers with the 2-bolt flange in the 1995-99 NSX factory position.
  • Steps up from factory flange size to 3" throughout.
  • Designed to flow up to 81 LB/MIN (approximately 700 HP).
  • 304 stainless steel tubing & flanges.
  • Full stainless steel construction & precision back-purged TIG welding.
  • Manufactured by ScienceofSpeed in the USA.

Options

Pre-Muffler Assembly Options:

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 the 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 excessively rich 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 converters causing ignition and elevated temperatures. There is no warranty provided for catalytic converters damaged from excessively rich air/fuel mixtures.

Exhaust Muffler Assembly Options:

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 crossflow perforated tube design. The tubing and flanges are 3.0" throughout 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" throughout 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.

ScienceofSpeed Ultra-High Output GT-Spec Exhaust System - NSX, 1991-05

eap-1091

$1,295.00
ScienceofSpeed Ultra-High Output R-Spec Exhaust System - NSX, 1991-05

eap-1092

$1,595.00
ScienceofSpeed Ultra-High Output Test Pipes (requires compatible exhaust) - NSX, 1991-05

eap-1093

$595.00
ScienceofSpeed Ultra-High Output Catalytic Converter Set (required compatible exhaust) - NSX, 1991-05

eap-1096

$1,495.00