S Brand Collection

It has been 34 years since Honda introduced the venerable B-Series VTEC engine family. Though these engines were designed to be nearly bullet proof...

It has been 34 years since Honda introduced the venerable H-Series VTEC engine family. Though these engines were designed to be nearly bullet proof...

The STM T4 undivided turbo inlet gasket is USA made in-house at STM from 13 gauge (0.90") 304 stainless steel.Vehicle Fitment:• For T4 rectangular ...

The STM T4 divided turbo inlet gasket is USA made in-house at STM from 13 gauge (0.90") 304 stainless steel.Vehicle Fitment:• For T4 rectangular di...

This STM 4B11 exhaust manifold head flange is machined in-house out of 304 stainless steel and fits Mitsubishi 4B11 Evo X and Ralliart heads. The f...

The past decade has set an industry standard for running level 2.9 and 3.9 high-performance axles in FWD and AWD converted street cars. It is not u...

Get Reliability and Performance with SpeedFactory Direct-Fit Honda Street Axles Introducing SpeedFactory’s new direct-fit Honda B-Series FWD street...

Get Reliability and Performance with SpeedFactory Direct-Fit Honda Street Axles Introducing SpeedFactory’s new direct-fit Honda K-Swap street axles...

The STM MAP sensor adaptor allows you to replace the OEM MAP sensor with an aftermarket pressure sensor that utilizes an 1/8" NPT thread. The new S...

The STM M14x1.5 magnetic engine oil drain plug can be used with most Mitsubishi cars including all Evo models, 1G/2G DSM, GVR4 and 3S. Also fits 19...

STM under-hood shifter cable bushings for 2010-2015 Evo X manual transmission models will give you firm, more consistent shifts. Upon install, we r...

The EF3544 16" Fan is individually balanced for long life and features a fully sealed water & dust-proof motor of superior quality.EF3544 16" S...

Black Silicone Straight Joiners Ranging in sizes from 2", 2.25", 2.5", 2.75", 3", 4". They are all straights We typically do not hold these in stoc...

Line Lock/ Clutch Slipper RelayIf you want consistent quarter mile times, you need a relay with repeatable operation time after time. These Hella S...

SpeedFactory Racing M28x1.5 to -12AN Adapter FittingsMaximize your B-Series engine’s performance with SpeedFactory’s M28x1.5 to -12AN Adapter Fitti...

The Skunk Ultra BMF TLRC Camshaft System for H-Series engines is a roller cam and rocker combination that represents the latest in H-Series valvetr...

The Skunk Ultra BMF TLRC Camshaft System for H-Series engines is a roller cam and rocker combination that represents the latest in H-Series valvetr...

The Skunk Ultra BMF TLRC Camshaft System for H-Series engines is a roller cam and rocker combination that represents the latest in H-Series valvetr...

At the core of the Ultra BMF TLRC system for B and H Series Honda engines are lightweight stainless roller rockers. At 35 grams, the total reciproc...

Bulk head stud for passing power through a bulk head or fuel tank. Max 25 Amps continuous per terminal (+5 AMP < 30 Sec) through a plastic bulkh...

CURRENT ESTIMATED MANIFOLD MANUFACTURING TIME IS 7-8 WEEKS.This manifold was designed specifically to fit large-frame sized turbos (72mm+). For sma...

CURRENT ESTIMATED MANIFOLD MANUFACTURING TIME IS 7-8 WEEKS.These manifolds will fit small to mid-frame sized turbos only. For larger frame turbocha...

The billet STM Evo 8/9 water pump block off plate is designed for racecars allowing you to completely block off / remove your water pump. Perfect f...

The STM Evo X fuel pressure regulator kit includes all fittings, hardware and line to go from your factory style fuel rail outlet to the Fuelab reg...

Fitting: 2001-2011 K20 6 speed RSX DC5 ITR CTR Civic Si  3.266 ratio 15T 1st / 2.13 ratio 23T 2nd

Fitting: B18B Y80 S80 (LS model) Included: 1-5 Premium Brass Synchros, 1-5 synchro springs, 1-5 slider sleeves, 5 shaft bearings, bearing clip, 2 a...

Fitting: 01-04 Integra Type R (Y2M3) JDM DC5 K206 speed with triple cone 1st/2nd, dual cone 3rd/4th/5th/6th synchro design Included: Synchrotech® 1...

Fitting: 2005-2006 Acura RSX Type S K20 6 speed (NSN4) Included: Synchrotech® 1-6 Brass Synchro Set , 1-6 springs, 4 shaft bearings, bearing clip, ...

Fitting: 92-95 Civic DX/LX SOHC D15 S20 (White 35mm ID speedo gear on diff) Included: 1-5 Pro-Series Carbon Lined Synchros, 1-5 synchro springs, 1-...

Fitting: 89-91 CRX/Civic DX/LX SOHC D15 L3 (White 35mm ID speedo gear on diff) Included: 1-5 Pro-Series Carbon Lined Synchros, 1-5 synchro springs,...

Fitting: B18B Y80 S80 (LS model) Included: 1-5 Pro-Series Carbon Lined Synchros, 1-5 synchro springs, brass reverse synchro and spring, 1-5 slider ...

Fitting: YS1 (B16/B17) Included: 1-5 Pro-Series Carbon Lined Synchros, 1-5 synchro springs, reverse synchro and spring, 1-5 slider sleeves, 5 shaft...

Fitting: 2005-2006 Acura RSX Type S K20 6 speed (NSN4) Included: Synchrotech® 1-6 Pro Series Carbon Synchro Set , 1-6 springs, 4 shaft bearings, be...

Synchrotech® Pro Series Carbon Synchro Set  Fitting: Tremec T5 World Clas

Fitting: 2003-2007 Mitsubishi Evolution 8/9 (5 speed trans) Included: Synchrotech® 1-5 Pro Series Carbon Synchro Set

1-5 Synchro Spring set Fitting: H22 models with case ID M2Y4, M2U4, M2F4, M2A4

1-5 Synchro Spring set Fitting: H23 F22 models with case ID (H2A5 H2U5 P2A5 P2U5 P2A8 M2S4)

Synchrotech® Premium Brass Synchro Fitting: SLW 01-05 Civic DX/LX/EX 2nd

NSG370 Rebuild Kit with 1-4 Carbon Fiber Friction Rings , 5-6 Carbon Synchros, Brass Reverse Synchro, Bearings and Seals   Fitting NSG370 2005-2016...

Synchrotech® Pro Series Carbon Synchro Upgrade  Listing is for one MT82 Reverse Carbon Synchro Ring  Features: Carbon Fiber Lining Brass Body Im...

Synchrotech® Pro Series Carbon Synchro Upgrade  Listing is for one MT82 Center Friction Ring (4 Required) Features: Carbon Fiber Lining Steel Body...

Synchrotech® Pro Series Carbon Synchro Upgrade  Listing is for one MT82 inner Friction Ring (2 Required) Features: Carbon Fiber Lining Steel Body ...

Synchrotech® Pro Series Carbon Synchro Upgrade  Listing is for one MT82 5-6 Carbon Synchro Ring (2 Required) Features: Carbon Fiber Lining Steel B...

Synchrotech® 3-4 Hardened Synchronizer Sleeve     Fitting: V160 6 speed Toyota Supra Twin Turbo JZA80 Type B 10/93 - 08/02 

Synchrotech® 1-2 Hardened Synchronizer Sleeve     Fitting: V160 6 speed Toyota Supra Twin Turbo JZA80 Type B 10/93 - 08/02

Carbon Synchro Friction Ring 1 piece Fitting: NV5600 1st, 2nd, 3rd, 4th, 5th, 6th or Reverse Carbon Synchro Friction Ring  Interchange: NV44548  

Synchrotech®  1-6-R Carbon Synchro Friction 7 piece Set Fitting: NV5600  1-6-R Carbon Center Friction Ring Set Interchange: SRK492 / NV44548

Carbon Synchro Ring (5-R) Fitting: NV4500 5th or Reverse Carbon Synchronizer Ring  Interchange: NV24024