Vacuum Assisted Resin Transfer Molding (VARTM) is a widely used, cost-effective out-of-autoclave process to manufacture fiber-reinforced polymer composites. However, laminate quality is compromised mainly due to the use of elastic vacuum bag as the upper mold. The elastic vacuum bag swells during mold filling and causes thickness variation and nonuniform mechanical properties in fabricated laminates. Recent studies showed that modification of conventional VARTM by applying an external pressure on the vacuum bag or infusing the resin at an elevated pressure could substantially change the process dynamics, which in turn improves the quality of the fabricated composite. This is achieved by using an external pressure chamber mounted on top of the lower mold, which can be pressurized at different levels. Heated and Externally Pressurized VARTM (HP-VARTM), Dynamic Pressure Control in VARTM (DPC), and Pressurized Infusion (PI) are some of these novel fabrication methods. While HP-VARTM improves laminate quality by applying high compaction pressure on the preform after mold filling, DPC manipulates the compaction pressure during mold filling to reduce the mold filling time. Additionally, PI improves laminate properties and achieves short cycle times by the manipulation of both compaction and resin pressures. Due to unique features of these processes, uniform laminates with up to 64% fiber volume fraction and below 1% void content can be fabricated which lead to significant improvement in mechanical properties. Furthermore, the manipulation of compaction and resin pressures yields almost 50% reduction in mold filling time compared to conventional VARTM.