aFe Twisted Steel 304 Stainless Steel Header w/ Cat for 98-05 Lexus GS300 / 01-05 Lexus IS300 (48-36017-HC) 1835 The polished tips gives you

The polished tips gives you an option for a more traditionally styled aftermarket exhaust

Deatschwerks 8AN ORB Male to 3/8" Male EFI Quick Connect Adapter (incl O-Ring) (6-02-0115)

ARK Downpipes is a direct replacement for your stock downpipe

They include a mandrel-bent aluminum intake tube and high quality hardware designed to reduce restriction and reduce intake temperature

aFe Twisted Steel 304 Stainless Steel Header w/ Cat for 98-05 Lexus GS300 / 01-05 Lexus IS300 (48-36017-HC) 1835 The polished tips gives youThis system is constructed of 1 5 8 IN 2 1 2 IN mandrel bent 304 stainless steel tubing for maximum strength and durability. Includes dual EPA compliant catalytic converters which are less restrictive than the factory converters providing maximum flow. Factory style laser cut machined flanges are used used for a secure leak free seal. Utilizing factory style flanges this system is designed to fit in the stock locations with no cutting or modifications