1965 Pontiac GTO Mod Guide
• 335 HP / 431 lb-ft • RWD
Best Performance Mods for the 1965 Pontiac GTO
Looking to get more power out of your Pontiac GTO? We've cataloged 13 performance parts across 4 categories with real-world HP and torque gains.
The biggest single gain? The Edelbrock Edelbrock 60509: Edelbrock Performer RPM Cylinder Heads (Cylinder Heads) adds +55 HP on its own.
Exhaust (Cat-Back)
Cat-back and axle-back exhaust systems
Pypes Performance Exhaust Pypes Performance Exhaust SGA11: Pypes No-Muffler Exhaust Systems
Pypes Performance Exhaust SGA11: Exhaust System, No-Muffler, Header-Back, Stainless Steel, Natural, Buick, Chevy, Oldsmobile, Pontiac, V8, Kit - Pypes No-Muffler exhaust systems are designed to delive
Pypes Performance Exhaust Pypes Performance Exhaust SGA14: Pypes No-Muffler Exhaust Systems
Pypes Performance Exhaust SGA14: Exhaust System, No-Muffler, Header-Back, Stainless Steel, Natural, Buick, Chevy, Oldsmobile, Pontiac, V8, Kit - Pypes No-Muffler exhaust systems are designed to delive
Pypes Performance Exhaust Pypes Performance Exhaust SGA14SS: Pypes No-Muffler Exhaust Systems
Pypes Performance Exhaust SGA14SS: Exhaust System, No Mufflers, Header-Back, Polished Stainless Steel, X-Pipe, Buick, Chevy, Olds, Pontiac, V8 - Pypes No-Muffler exhaust systems are designed to delive
Flowmaster Flowmaster 81073: Flowmaster Manifold Downpipes
Flowmaster 81073: Intermediate Pipes, Manifold Downpipe, Stainless Steel, Natural, 2.50 in. O.D., Pontiac, Pair - Flowmaster manifold downpipes are designed for the person who wants to use a crossmemb
Flowmaster Flowmaster 1041: Flowmaster Pipe Kits
Flowmaster 1041: Exhaust System, Header-Back, Pipe Kit Only, Buick, Chevy, Oldsmobile, Pontiac, Steel, Aluminized, Kit - Flowmaster pipe kits are just like the Flowmaster exhaust systems except they d
Headers/Manifold
Long tube and shorty headers
Kooks Headers Kooks Headers 29202400: Kooks Headers Race Long Tube Headers
Kooks Headers 29202400: Headers, Long Tube, Stainless Steel, Natural, 1.875 in. Tube, 3.00 in. Collector, Chevy, LSX Small Block - Kooks Headers race long tube headers will deliver high performance to
Flowmaster Flowmaster 814116: Flowmaster Scavenger Series Elite Headers
Flowmaster 814116: Headers, Scavenger Series Elite, Long Tube, Stainless, Polished Ceramic Coated, Chevy, LS Engine, Pair - These Flowmaster Scavenger Series Elite headers open up airflow for serious
Downpipe
Catted and catless downpipes
Flowmaster Flowmaster 81073: Flowmaster Manifold Downpipes
Flowmaster 81073: Intermediate Pipes, Manifold Downpipe, Stainless Steel, Natural, 2.50 in. O.D., Pontiac, Pair - Flowmaster manifold downpipes are designed for the person who wants to use a crossmemb
Cylinder Heads
Ported and performance heads
Edelbrock Edelbrock 60509: Edelbrock Performer RPM Cylinder Heads
Edelbrock 60509: Cylinder Head, Performer RPM, Aluminum, Bare, 72cc Chamber, 215cc, Pontiac, Semi Finished, 389-455, Each - Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts in
Edelbrock Edelbrock 60589: Edelbrock Performer RPM Cylinder Heads
Edelbrock 60589: Cylinder Head, Performer RPM, Aluminum, Bare, 72cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each - Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts in t
Edelbrock Edelbrock 60599: Edelbrock Performer RPM Cylinder Heads
Edelbrock 60599: Cylinder Head, Performer RPM, Aluminum, Assembled, 72cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each - Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts
Edelbrock Edelbrock 60575: Edelbrock Performer Cylinder Heads
Edelbrock 60575: Cylinder Head, Performer, Aluminum, Assembled, 87cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each - All Edelbrock aluminum cylinder heads feature threaded inserts in the rocker
Edelbrock Edelbrock 60579: Edelbrock Performer Cylinder Heads
Edelbrock 60579: Cylinder Head, Performer, Aluminum, Assembled, 87cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each - All Edelbrock aluminum cylinder heads feature threaded inserts in the rocker
Ready to build?
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